It is fashion's biggest night (May 7), and it never seems to disappoint. Yes, tonight is the Metropolitan Museum of Art's Costume Institute benefit in New York City. The event, of course, is more commonly known as the Met Gala.Why does it matter?Tonight is the night that we get to see all of our favorite stars wearing some incredible outfits. Of course, some of those outfits are good and others... not so much.