President Barack Obama talks to Beyonce before she sings the National Anthem at his ceremonial swearing-in at the U.S. Capitol during the 57th Presidential Inauguration in Washington, Monday, Jan. 21, 2013. (AP Photo/Evan Vucci)

President Barack Obama kisses Beyonce after she sang the National Anthem at the ceremonial swearing-in on the West Front of the U.S. Capitol during the 57th Presidential Inauguration in Washington, Monday, Jan. 21, 2013. (AP Photo/Pablo Martinez Monsivais)

Vice President Joe Biden, right, watches as President Barack Obama kisses Beyonce at the ceremonial swearing-in at the U.S. Capitol during the 57th Presidential Inauguration in Washington, Monday, Jan. 21, 2013. (AP Photo/Paul Sancya)

President Barack Obama greets singer Beyonce during the 57th Presidential Inauguration ceremonial swearing-in at the US Capitol on January 21, 2013 in Washington, DC. AFP PHOTO/Jewel Samad

US President Barack Obama and First Lady Michelle Obama attend the National Prayer Breakfast in Washington, DC, on February 6, 2014. . AFP PHOTO/Jewel Samad

Beyonce sings the National Anthem at U.S. President Barack Obama's inauguration ceremonies on the West Front of the U.S Capitol in Washington, D.C., USA, January 21, 2013. Photo by Brian Cassella/Chicago Tribune/MCT/ABACAPRESS.COM

Beyonce and husband Jay-Z arrive for the 57th Presidential Inauguration ceremonial swearing-in of President Barack Obama at the US Capitol on January 21, 2013 in Washington, DC. The oath is to be administered by US Supreme Court Chief Justice John Roberts, Jr. AFP PHOTO/Jewel Samad

US singer Beyonce is greeted by US President Barck Obama after performing the National Anthem to conclude the 57th Presidential Inauguration ceremonial swearing-in of Obama at the US Capitol on January 21, 2013 in Washington, DC. AFP PHOTO/Stan HONDA

First Lady Michelle Obama greets singer Beyonce during the 57th Presidential Inauguration ceremonial swearing-in at the US Capitol on January 21, 2013 in Washington, DC. AFP PHOTO/Jewel Samad

US President Barack Obama greets singer Beyonce after she performs the National Anthem during the public ceremonial inauguration on the West Front of the US Capitol January 21, 2013 in Washington, DC. Barack Obama was re-elected for a second term as President of the United States. AFP PHOTO/POOL/WIN MCNAMEE

US President Barack Obama greets singer Beyonce after she performs the National Anthem during the public ceremonial inauguration on the West Front of the US Capitol January 21, 2013 in Washington, DC. Barack Obama was re-elected for a second term as President of the United States. AFP PHOTO/POOL/WIN MCNAMEE

President Barack Obama greets singer Beyonce on the West Front of the Capitol in Washington, Monday, Jan. 21, 2013, after she sang the National Anthem during the president's ceremonial swearing-in ceremony during the 57th Presidential Inauguration. (AP Photo/Win McNamee, Pool)

President Barack Obama greets singer Beyonce on the West Front of the Capitol in Washington, Monday, Jan. 21,2013, after she performed the National Anthem at the ceremonial swearing-in ceremony during the 57th Presidential Inauguration. (AP Photo/Win McNamee, Pool)