Vanessa Hudgens and Katharine McPhee in Washington

American Idol runners up (2006) Katharine McPhee, and HSM star Vanessa Hudgens performed at TNT's holiday special "Christmas In Washington" hosted by Dr. Phil and his wife Robin McGraw in Washington, Monday, December 11.

The annual event which features some of today's most popular artists singing your holiday favorites will air on TNT Wednesday, Dec. 12 at 10PM ET/PT.

Other singers headlining the event include R&B and pop singer / songwrite Ne-Yo, country superstar Alan Jackson, Italian vocalist Andrea Bocelli, acoustic-folk singer-songwriter Colbie Caillat and Trinidadian R&B and soul singer Heather Headley.

Christmas In Washington is attended by the President and First Lady and other Washington VIPs. Proceeds from the event benefit the National Children's Medical Center.

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