RBP ConcertsDiana Ross will be among the performers on the annual TNT special Christmas in Washington.  The show is being taped December 9 at the National Building Museum in Washington, D.C., and will air Friday, December 21 at 8 p.m. ET/PT.

Joining the legendary Motown diva on the program will be pop star and X Factor judge Demi Lovato, American Idol season 10 champ Scotty McCreery, Smash star Megan Hilty and The Voice season two finalist Chris Mann.  Closing out the special will be PSY, the South Korean rapper behind the hugely popular dance tune "Gangnam Style."

TNT's Christmas in Washington will be hosted by Conan O'Brien.

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