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Demi Lovato, Psy and Diana Ross to Headline TNT's Christmas Special

Demi Lovato Psy Split - P 2012
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Demi Lovato and Psy

Conan O'Brien returns to host the holiday telecast airing Dec. 21.

The X Factor judge Demi Lovato, "Gangnam Style" sensation Psy and Diana Ross will headline the annual Christmas in Washington special airing Dec. 21 on TNT.

Late-night host Conan O'Brien will lead the telecast, to be taped in Washington D.C.'s National Building Museum, for the second consecutive year.

Additional performers include Smash star Megan Hilty, former Voice finalist Chris Mann and American Idol winner Scotty McCreery.

President Barack Obama and First Lady Michelle will attend.

This is the 14th year TNT will be broadcasting Christmas in Washington. It is executive produced by George Stevens Jr. and directed/produced by Michael Stevens for The Stevens Company. Ricki Rosenfeld and David Bryant are also EPs.

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