Mariah Carey sings before President Barack Obama at Christmas event

Slideshow posted in Entertainment News | Monday, December 13, 2010

1 of 18: Singer Mariah Carey performs during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 12, 2010. Watching at the back is actress Miranda Cosgrove. (AP Photo / Manuel Balce Ceneta)

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