The annual Metropolitan Museum's Costume Institute Gala goes down in NYC tomorrow! Like years past, 2012's gala is sure to be full of famous faces and daring fashions. Before the big day, we're looking back at some memorable moments from the event in years past. Gisele Bündchen, Gwyneth Paltrow, and even Princess Diana were among those who attended galas in the '90s. Tom Cruise and Katie Holmes, meanwhile, hit the carpet more recently, along with Blake Lively, Beyoncé Knowles, Kristen Stewart, and more. Click through to see all the amazing ensembles.