Making for quite the star-studded affair, the biggest names in Hollywood were out for "The Model as Muse: Embodying Fashion" Costume Institute Gala in NYC on Monday night (May 4).

Leading off the high-profile guest list were Hollywood beauties including Kate Hudson, Rihanna, Kate Bosworth and Liv Tyler - all decked out in their finest garb.

Also on the guest list were fellow Tinseltown treasures including Jessica Alba, Heidi Klum, Jessica Biel, Madonna, Victoria Beckham, Emma Roberts, Molly Sims, Brooklyn Decker and Molly Sims, among many others.

During the course of the evening, Justin Timberlake, Kate Moss, Marc Jacobs and Anna Wintour hosted the annual gala in an effort to raise money for the organization.