US President Barack Obama (2R), First Lady Michelle Obama (3R) and their daughters, Sasha and Malia (R), await children dressed as elves prior to the taping of “Christmas in Washington,” at the National Building Museum in Washington, DC, December 11, 2011. The show, hosted by Conan O’Brien, features performances and appearances by Justin Bieber, Cee Lo Green, Jennifer Hudson, Victoria Justice and The Band Perry and airs on television December 16. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)