Diana Ross, Demi Lovato, Scotty McCreery, Psy and Conan Christmas Special (Recap)

The special will feature Diana Ross, Smash star Megan Hilty, chart-topping recording star Demi Lovato, The Voice's Chris Mann and American Idol winner Scotty McCreery and a finale with "Gangnam Style" hitmaker Psy.

The special is set to premiere Friday, December 21, at 8 p.m. (ET/PT) on TNT, and will be taped at the National Building Museum in Washington, D.C., on Sunday, December 9th.

Celebrating its 31st anniversary this year, Christmas in Washington is a holiday tradition benefiting the Children's National Medical Center. - more on this story

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