Hail to the Chic: All the White House Correspondents Dinner DressesCheck out the gowns Katy Perry, Sofia Vergara, Kerry Washington and more stars wore for Hollywood's biggest night in our nation's capital


She left her Barack Obama-themed fashion at home, but the pop star still made a statement in a green Giambattista Valli Haute Couture gown with a gilded belt, plus Adeler jewelry.