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NEW YORK - NOVEMBER 03: Singers Alicia Keys and Usher perform onstage at the Keep a Child Alive Annual Fundraiser "The Black Ball" at Frederick P. Rose Hall at Lincoln Center November 3, 2005 in New York City. (Photo by Andrew H. Walker/Getty Images)

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HOLLYWOOD - AUGUST 31: Usher sings to Beyonce Knowles of Destiny's Child onstage at the 2005 World Music Awards at the Kodak Theatre on August 31, 2005 in Hollywood, California. (Photo by Kevin Winter/Getty Images)

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CLEVELAND - JUNE 02: Singer and part owner of the Cleveland Cavaliers, Usher, performs the National Anthem prior to Game Six of the Eastern Conference Finals between the Detroit Pistons and the Cleveland Cavaliers during the 2007 NBA Playoffs on June 2, 2007 at the Quicken Loans Arena in Cleveland, Ohio. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Gregory Shamus/Getty Images)

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NEW YORK - SEPTEMBER 06: Singers Usher and Mary J. Blige perform onstage at the Conde Nast Media Group's Fourth Annual Fashion Rocks Concert at Radio City Music Hall September 6, 2007 in New York City. (Photo by Bryan Bedder/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)

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LONDON - MAY 22: Usher performs an exclusive gig for Sony Ericsson at the Indigo Lounge in the O2 Arena on May 22, 2008 in London, England. (Photo by Dan Kitwood/Getty Images)

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LONDON - MAY 22: Usher performs an exclusive gig for Sony Ericsson at the Indigo Lounge in the O2 Arena on May 22, 2008 in London, England. (Photo by Dan Kitwood/Getty Images)

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NEW YORK - MAY 30: Singer Usher performs on ABC's "Good Morning America" in Bryant Park on May 30, 2008 in New York City. (Photo by Brad Barket/Getty Images)

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ABUJA, NIGERIA - JULY 11: Recording artist Usher performs during the 3rd This Day Africa Rising concert on July 11, 2008 in Abuja, Nigeria. (Photo by Dan Kitwood/Getty Images)

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LOS ANGELES, CA - JUNE 24: Singer Usher performs onstage during the 2008 BET Awards held at the Shrine Auditorium on June 24, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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ABUJA, NIGERIA - JULY 11: Recording artist Usher performs during the 3rd This Day Africa Rising concert on July 11, 2008 in Abuja, Nigeria. (Photo by Dan Kitwood/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)

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ABUJA, NIGERIA - JULY 11: Recording artist Usher performs during the 3rd This Day Africa Rising concert on July 11, 2008 in Abuja, Nigeria. (Photo by Dan Kitwood/Getty Images)

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LONDON - MAY 22: Usher performs an exclusive gig for Sony Ericsson at the Indigo Lounge in the O2 Arena on May 22, 2008 in London, England (Photo by Dan Kitwood/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)

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LOS ANGELES, CA - JUNE 24: Singer Usher performs onstage during the 2008 BET Awards held at the Shrine Auditorium on June 24, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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MIAMI BEACH, FL - NOVEMBER 15: Recording artist Usher performs as Victoria's Secret Angel Doutzen Kroes walks the runaway during the 2008 Victoria's Secret Fashion Show at the Fontainebleau on November 15, 2008 in Miami Beach, Florida. (Photo by Alexander Tamargo/Getty Images)

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LAS VEGAS - JANUARY 08: The singer Usher performs at the keynote address of Sony Corp. Chairman and CEO Sir Howard Stringer at the Venetian during the 2009 International Consumer Electronics Show (CES) January 8, 2009 in Las Vegas, Nevada. CES, the world's largest annual consumer technology trade show, runs through January11 and features 2,700 exhibitors showing off their latest products and services to more than 130,000 attendees. (Photo by David McNew/Getty Images)

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WASHINGTON - JANUARY 18: Musicians Stevie Wonder and Usher perform in front of the Lincoln Memorial during the "We Are One: The Obama Inaugural Celebration At The Lincoln Memorial" on January 18, 2009 at the National Mall in Washington, DC. The event includes a diverse array of talent featuring both musical performances and historical readings and an appearance by U.S. President-elect Barack Obama. (Photo by Justin Sullivan/Getty Images)

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LOS ANGELES, CA - JULY 07: Singer Usher performs at the Michael Jackson public memorial service held at Staples Center on July 7, 2009 in Los Angeles, California. Jackson, 50, the iconic pop star, died at UCLA Medical Center after going into cardiac arrest at his rented home on June 25 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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WASHINGTON - JANUARY 18: Singers Stevie Wonder (C), Shakira (L) and Usher perform at "We Are One: The Obama Inaugural Celebration At The Lincoln Memorial" January 18, 2009 in Washington, DC. The event includes a diverse array of talent featuring both musical performances and historical readings and an appearance by U.S. President-elect Barack Obama. (Photo by Mark Wilson/Getty Images)

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ATLANTA - JULY 24: Usher's Camp New Look Campers perform at the closing ceremony for Usher's Camp New Look at the Alliance Theater at the Woodruff Arts Center on July 24, 2009 in Atlanta, Georgia. (Photo by Rick Diamond/Getty Images for Usher's New Look)

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LOS ANGELES, CA - JANUARY 31: Singers Smokey Robinson (L) and Usher perform onstage during the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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LOS ANGELES, CA - JULY 07: Singer Usher performs at the Michael Jackson public memorial service held at Staples Center on July 7, 2009 in Los Angeles, California. Jackson, 50, the iconic pop star, died at UCLA Medical Center after going into cardiac arrest at his rented home on June 25 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

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LOS ANGELES, CA - JULY 07: Singer Usher performs at the Michael Jackson public memorial service held at Staples Center on July 7, 2009 in Los Angeles, California. Jackson, 50, the iconic pop star, died at UCLA Medical Center after going into cardiac arrest at his rented home on June 25 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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ARLINGTON, TX - FEBRUARY 14: R&B artist Usher performs during introductions prior to the start of the NBA All-Star Game, part of 2010 NBA All-Star Weekend at Cowboys Stadium on February 14, 2010 in Arlington, Texas. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Jed Jacobsohn/Getty Images)

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LOS ANGELES, CA - JANUARY 31: Singers Smokey Robinson (L) and Usher perform onstage during the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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ATLANTA - JULY 24: Usher's Camp New Look Campers perform at the closing ceremony for Usher's Camp New Look at the Alliance Theater at the Woodruff Arts Center on July 24, 2009 in Atlanta, Georgia. (Photo by Rick Diamond/Getty Images for Usher's New Look)

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LOS ANGELES, CA - JULY 07: Singer Usher performs at the Michael Jackson public memorial service held at Staples Center on July 7, 2009 in Los Angeles, California. Jackson, 50, the iconic pop star, died at UCLA Medical Center after going into cardiac arrest at his rented home on June 25 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

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LOS ANGELES, CA - JULY 07: Singer Usher performs at the Michael Jackson public memorial service held at Staples Center on July 7, 2009 in Los Angeles, California. Jackson, 50, the iconic pop star, died at UCLA Medical Center after going into cardiac arrest at his rented home on June 25 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

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LOS ANGELES, CA - JULY 07: Singer Usher performs at the Michael Jackson public memorial service held at Staples Center on July 7, 2009 in Los Angeles, California. Jackson, 50, the iconic pop star, died at UCLA Medical Center after going into cardiac arrest at his rented home on June 25 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

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WASHINGTON - JANUARY 18: Musicians Stevie Wonder and Usher perform in front of the Lincoln Memorial during the "We Are One: The Obama Inaugural Celebration At The Lincoln Memorial" on January 18, 2009 at the National Mall in Washington, DC. The event includes a diverse array of talent featuring both musical performances and historical readings and an appearance by U.S. President-elect Barack Obama. (Photo by Justin Sullivan/Getty Images)

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WASHINGTON - JANUARY 18: Singers Stevie Wonder (C), Shakira (L) and Usher perform at "We Are One: The Obama Inaugural Celebration At The Lincoln Memorial" January 18, 2009 in Washington, DC. The event includes a diverse array of talent featuring both musical performances and historical readings and an appearance by U.S. President-elect Barack Obama. (Photo by Mark Wilson/Getty Images)

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LAS VEGAS - JANUARY 08: The singer Usher performs at the keynote address of Sony Corp. Chairman and CEO Sir Howard Stringer at the Venetian during the 2009 International Consumer Electronics Show (CES) January 8, 2009 in Las Vegas, Nevada. CES, the world's largest annual consumer technology trade show, runs through January11 and features 2,700 exhibitors showing off their latest products and services to more than 130,000 attendees. (Photo by David McNew/Getty Images)

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MIAMI BEACH, FL - NOVEMBER 15: Recording artist Usher performs as Victoria's Secret Angel Doutzen Kroes walks the runaway during the 2008 Victoria's Secret Fashion Show at the Fontainebleau on November 15, 2008 in Miami Beach, Florida. (Photo by Alexander Tamargo/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - NOVEMBER 03: Singer Usher performs during the "One Night Stand" tour at the Hammerstein Ballroom on November 3, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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NEW YORK - SEPTEMBER 04: Singer Usher performs during the 2008 NFL Kickoff at Columbus Circle on September 4, 2008 in New York City. (Photo by Scott Gries/Getty Images)

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ABUJA, NIGERIA - JULY 11: Recording artist Usher performs during the 3rd This Day Africa Rising concert on July 11, 2008 in Abuja, Nigeria. (Photo by Dan Kitwood/Getty Images)

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ABUJA, NIGERIA - JULY 11: Recording artist Usher performs during the 3rd This Day Africa Rising concert on July 11, 2008 in Abuja, Nigeria. (Photo by Dan Kitwood/Getty Images)

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ABUJA, NIGERIA - JULY 11: Recording artist Usher performs during the 3rd This Day Africa Rising concert on July 11, 2008 in Abuja, Nigeria. (Photo by Dan Kitwood/Getty Images)

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LOS ANGELES, CA - JUNE 24: Singer Usher performs onstage during the 2008 BET Awards held at the Shrine Auditorium on June 24, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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LOS ANGELES, CA - JUNE 24: Singer Usher performs onstage during the 2008 BET Awards held at the Shrine Auditorium on June 24, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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NEW YORK - MAY 30: Singer Usher performs on ABC's "Good Morning America" in Bryant Park on May 30, 2008 in New York City. (Photo by Brad Barket/Getty Images)

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LONDON - MAY 22: Usher performs an exclusive gig for Sony Ericsson at the Indigo Lounge in the O2 Arena on May 22, 2008 in London, England (Photo by Dan Kitwood/Getty Images)

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LONDON - MAY 22: Usher performs an exclusive gig for Sony Ericsson at the Indigo Lounge in the O2 Arena on May 22, 2008 in London, England. (Photo by Dan Kitwood/Getty Images)

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LONDON - MAY 22: Usher performs an exclusive gig for Sony Ericsson at the Indigo Lounge in the O2 Arena on May 22, 2008 in London, England. (Photo by Dan Kitwood/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)

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NEW YORK - SEPTEMBER 06: Singers Usher and Mary J. Blige perform onstage at the Conde Nast Media Group's Fourth Annual Fashion Rocks Concert at Radio City Music Hall September 6, 2007 in New York City. (Photo by Bryan Bedder/Getty Images)

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CLEVELAND - JUNE 02: Singer and part owner of the Cleveland Cavaliers, Usher, performs the National Anthem prior to Game Six of the Eastern Conference Finals between the Detroit Pistons and the Cleveland Cavaliers during the 2007 NBA Playoffs on June 2, 2007 at the Quicken Loans Arena in Cleveland, Ohio. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Gregory Shamus/Getty Images)

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NEW YORK - NOVEMBER 03: Singers Alicia Keys and Usher perform onstage at the Keep a Child Alive Annual Fundraiser "The Black Ball" at Frederick P. Rose Hall at Lincoln Center November 3, 2005 in New York City. (Photo by Andrew H. Walker/Getty Images)

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HOLLYWOOD - AUGUST 31: Usher sings to Beyonce Knowles of Destiny's Child onstage at the 2005 World Music Awards at the Kodak Theatre on August 31, 2005 in Hollywood, California. (Photo by Kevin Winter/Getty Images)

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MAIDSTONE, UNITED KINGDOM - MAY 10: Usher performs at Radio 1's Big Weekend in Mote Park on May 10, 2008 in Maidstone, England. (Photo by Chris Jackson/Getty Images)