Obamas celebrate 'Christmas in Washington'

President Barack Obama took part in the 'Christmas in

Washington' concert with first lady Michelle Obama and daughters

Malia and Sasha Obama at the National Building Museum on Dec. 9,

2012 in Washington, D.C.

The first family, from left, first lady Michelle Obama, Sasha Obama, President Barack Obama and Malia Obama, pose with children dressed like elves at the National Building Museum in Washington, Sunday, Dec. 9, 2012. The first family is attending the taping of the 2012 Christmas in Washington. (AP Photo/Manuel Balce Ceneta)

President Barack Obama, third from left, with his daughters Malia Obama, from left, and Sasha Obama, join host, from third right to right, Conan O'Brien, singer Megan Hilty, South Korean rapper PSY and other performers, during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 9, 2012. (AP Photo/Manuel Balce Ceneta)

Obamas Christmas

Singer Chris Mann, First Lady Michelle Obama, Marian Shields Robinson and singer Diana Ross speak onstage during TNT Christmas in Washington 2012 at National Building Museum on December 9, 2012 in Washington, DC. (Photo by Theo Wargo/Getty Images)