WASHINGTON, DC – DECEMBER 11: (AFP OUT) (L-R) The Band Perry, Conan O’Brien, first lady Michelle Obama and daughters Malia and Sasha; U.S. President Barack Obama, Jennifer Hudson, Victoria Justice and Justin Bieber join together for a final song at the conclusion of the performances at the annual “Christmas in Washington” gala on December 11, 2011 in Washington, DC. It’s the 30th anniversary of the “Christmas in Washington” gala. (Photo by Mike Theiler-Pool/Getty Images)