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12/13/2010 09:39 am ET Updated May 25, 2011

Obamas Celebrate 'Christmas In Washington' With Very Pregnant Mariah Carey (PHOTOS)

The president, first lady, Sasha, Malia and First Granny stepped out for another holiday soiree on Sunday night, the annual Christmas in Washington presentation at the National Building Museum. A very pregnant Mariah Carey performed, along with Andrea Bocelli and Annie Lennox.

FLOTUS wore a 1950s-inspired black overlay dress, and the whole family played and posed for photos with children dressed up as elves.

TNT will air "Christmas in Washington" at 8pm EST on Sunday, December 20.

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