VIDEO: Demi Lovato Performs 'All I Want for Christmas is You' for the First Family
X FACTOR judge Demi Lovato recently decided to take on one of the most iconic, classic, and octave-pushing holiday songs: AMERICAN IDOL judge Mariah Carey's "All I Want for Christmas is You." If that wasn't bold enough in itself, she sang the holiday anthem for The First Family. Her performance was part of TNT's CHRISTMAS IN WASHINGTON SPECIAL, which aired Friday night. Check out the performance below!