By ETonline Staff
5:16 PM PDT, May 1, 2011
PICS: Hollywood Invades Capitol Hill
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Cee Lo

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John Legend

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Gayle King

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Ariel Winter & Mila Kunis

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David Arquette

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Bristol Palin

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Zach Galifianakis & Bradley Cooper

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President Barack Obama

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PICS: Hollywood Invades Capitol Hill

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On Saturday, all the stars were out in Washington D.C. for the White House Correspondents' Dinner, from the President and First Lady to the stars of 'The Hangover'!