Almost every a-list celeb attended "The Model as Muse: Embodying Fashion" Costume Institute Gala at The Metropolitan Museum of Art in New York on May 4.

Celebrities in attendance: Justin Timberlake and Jessica Biel, Ali Hewson, Bono, Anne Hathaway, Ashley Olsen and Justin Bartha, Billy Joel and Katie Lee Joe, Blake Lively, Emma Hemming and Bruce Willis, Emma Roberts, Eva Mendes, Heidi Klum, Helena Christensen, Jessica Alba, Kate Hudson, Stella McCartney, Liv Tyler and Kate Bosworth, Marc Jacobs and Kate Mos, Mary-Kate Olsen, Rihanna, Tom Brady and Gisele Bundchen, Tony Parker and Eva Longoria Parker, Victoria Beckham, Amber Rose and Kanye West, Cindy Crawford and more.