US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

Alicia Keys performs during the Commander-in-Chief's Inaugural Ball at the Washington Convention Center January 21, 2013 in Washington, DC. AFP PHOTO / Jewel SAMAD (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-SWEARING IN-OBAMA

The US Capitol is seen at sunrise prior to US President Barack Obama taking the oath of office during the 57th Presidential Inauguration ceremonial swearing-in at the US Capitol on January 21, 2013 in Washington, DC. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

DC Celebrates Inauguration With Gala Balls

WASHINGTON, DC - JANUARY 21: Musician Alicia Keys performs at the Commander-in-Chief Ball before the arrival of U.S. President Barack Obama and first lady Michelle Obama on January 21, 2013 in Washington, DC. U.S. President Barack Obama was sworn-in for his second term as president during a public ceremonial inauguration earlier in the day. (Photo by Justin Sullivan/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Commander-in-Chief's Ball, honoring US service members and their families, at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

Singer Jennifer Hudson performs for US President Barack Obama and First Lady Michelle Obama during the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

Singer Jennifer Hudson performs for US President Barack Obama and First Lady Michelle Obama during the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US-POLITICS-INAUGURATION-BALLS

First Lady Michelle Obama sings along to "Lets Stay Together" performed by Jennifer Hudson while dancing with US President Barack Obama during the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

DC Celebrates Inauguration With Gala Balls

WASHINGTON, DC - JANUARY 21: U.S. President Barack Obama (R) thanks (L-R) Sergeant Major of the Army Raymond Chandler, Sergeant Major of the Marine Corps Micheal Barrett, Master Chief Petty Officer of the Navy Michael Stevens, Chief Master Sergeant of the Air Force James Roy and Master Chief Petty Officer of the Coast Guard Michael Leavitt during the Commander-In-Chief Ball at the Walter Washington Convention Center January 21, 2013 in Washington, DC. Obama was sworn-in for his second term of office earlier in the day. (Photo by Chip Somodevilla/Getty Images)

DC Celebrates Inauguration With Gala Balls

WASHINGTON, DC - JANUARY 21: U.S. Vice President Joe Biden (2nd L) and Dr. Jill Biden (L) shake hands with actor and musician Jamie Foxx (R) after he sang while they danced at the Comander-in-Chief's Inaugural Ball at the Walter Washington Convention Center January 21, 2013 in Washington, DC. Biden and President Barack Obama each took their oath of office earlier in the day. (Photo by Chip Somodevilla/Getty Images)

DC Celebrates Inauguration With Gala Balls

(Photo by Chip Somodevilla/Getty Images)

DC Celebrates Inauguration With Gala Balls

WASHINGTON, DC - JANUARY 21: U.S. Vice President Joe Biden (L) and Dr. Jill Biden wave goodbye after actor and musician Jamie Foxx (R) sang while they danced at the Comander-in-Chief's Inaugural Ball at the Walter Washington Convention Center January 21, 2013 in Washington, DC. Biden and President Barack Obama each took their oath of office earlier in the day. (Photo by Chip Somodevilla/Getty Images)

US-POLITICS-INAUGURATION-BALLS

US President Barack Obama and First Lady Michelle Obama attend the Inaugural Ball at the Walter E. Washington Convention Center on January 21, 2013 in Washington, DC. AFP PHOTO/MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

President Obama And First Lady Attend Inaugural Balls

WASHINGTON, DC - JANUARY 21: President Barack Obama and first lady Michelle Obama dance together at the Commander-in-Chief's Inaugural Ball at the Washington Convention Center January 21, 2013 in Washington, DC. The president was sworn-in for his second term in office earlier in the day. (Photo by Pablo Martinez Monsivais-Pool/Getty Images)

President Obama And First Lady Attend Inaugural Balls

WASHINGTON, DC - JANUARY 21: President Barack Obama and first lady Michelle Obama walk on stage for their first dance together at the Commander-in-Chief's Inaugural Ball at the Washington Convention Center January 21, 2013 in Washington, DC. The president was sworn-in for his second term in office earlier in the day. (Photo by Pablo Martinez Monsivais-Pool/Getty Images)

57th United States Presidential Inauguration - General Atmosphere

WASHINGTON, DC - JANUARY 21: 57th United States Presidential Inauguration General Atmospher on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)

57th United States Presidential Inauguration - General Atmosphere

WASHINGTON, DC - JANUARY 21: 57th United States Presidential Inauguration General Atmospher on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)

An Alternative View Of The 2013 Inauguration

WASHINGTON, DC - JANUARY 21: (EDITORS NOTE: Image was processed and enhanced digitally using the Adobe Lightroom application.) An alternate view of the 57th Presidential Inauguration on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)

An Alternative View Of The 2013 Inauguration

WASHINGTON, DC - JANUARY 21: (EDITORS NOTE: Image was processed and enhanced digitally using the Adobe Lightroom application.) An alternate view of the 57th Presidential Inauguration on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)

An Alternative View Of The 2013 Inauguration

WASHINGTON, DC - JANUARY 21: (EDITORS NOTE: Image was processed and enhanced digitally using the Adobe Lightroom application.) An alternate view of the 57th Presidential Inauguration on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)

An Alternative View Of The 2013 Inauguration

WASHINGTON, DC - JANUARY 21: (EDITORS NOTE: Image was processed and enhanced digitally using the Adobe Lightroom application.) An alternate view of the 57th Presidential Inauguration on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)

An Alternative View Of The 2013 Inauguration

WASHINGTON, DC - JANUARY 21: (EDITORS NOTE: Image was processed and enhanced digitally using the Adobe Lightroom application.) An alternate view of the 57th Presidential Inauguration on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)

An Alternative View Of The 2013 Inauguration

WASHINGTON, DC - JANUARY 21: (EDITORS NOTE: Image was processed and enhanced digitally using the Adobe Lightroom application.) An alternate view of the 57th Presidential Inauguration on January 21, 2013 in Washington, United States. (Photo by Mike Coppola/Getty Images)