The annual Met Costume Gala took place last night like a prom for famous people.  And like any good prom, there were the share of guests who decided to let it all hang out!  Does Gisele's dress even count as a dress at this point?  And you couldn't miss Michelle Trachtenberg's pasties, how chic, while her co-star Blake pushed hers up like they were fake!  Eva Mendes looked ethereal in her flowing gown, but unfortch for her it was a little too flowing and she flashed us.  Ah, the Class of 2008, hope ya had a good time kids (and you didn't get too wasted at the after party)!