US President Barack Obama (2nd L) and First Lady Michelle Obama (R) and their daughters Malia (2nd R) and Sasha sing “Rudolf the Red Nose Reindeer” during the annual lighting of the National Christmas tree on December 1, 2011 at The Ellipse in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)