Last night the annual Met Costume Institute Gala brought the big names to the Metropolitan Museum of Art, all decked out in their best threads to celebrate the late Alexander McQueen. You can check out the exhibition yourself through the end of July, and we'll have more on the later, but first: to judge the celebrities! Click through for the best, the worst, and the weird (and below there's some video showing the barely-there side view of Rihanna's dress, and Beyonce's struggle walking up the stairs in her tight number.)