Justin Bieber will be performing before President Barack Obama and First Lady Michelle Obama at Christmas in Washington, an annual holiday event benefiting the National Children's Medical Center.

The special will be taped at the National Building Museum in Washington, D.C. on December 13, and premiere on TNT on Sunday, December 20 at 8 p.m. Mary J. Blige, Neil Diamond, Sugarland, Rob Thomas and Usher are also scheduled to perform at the event, which will be hosted by George Lopez.

"I get to sing for OBAMA!! Crazy!!!" Justin wrote on his Facebook page today. "I'm Canadian and I am still crazy excited. The President of the United States!?!?! NUTS. Feel blessed."

Sasha and Malia must be so excited!