Right around the time of the election, President Obama said in an interview that he thought he could do the "Gangnam Style" dance move, as featured in the ridiculously popular viral video by South Korean rapper PSY .  Well, he'll get a chance to learn it from PSY personally next month, since believe it or not, the rapper will be one of the performers on the annual TNT special Christmas in Washington .  In fact, he's closing the show with his famous hit.

Also on the bill for this year's special, whose taping is attended each year by the president and first lady, will be legendary diva Diana Ross , Demi Lovato , The Voice season two finalist Chris Mann , American Idol season 10 champ Scotty McCreery and Smash star Megan Hilty .   The special is being taped December 9 at the National Building Museum in Washington, D.C.

Christmas in Washington , hosted by Conan O'Brien, will air Friday, December 21 at 8 p.m. ET/PT.

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