Beyonce attends the "China: Through The Looking Glass" Costume Institute Benefit Gala at the Metropolitan Museum of Art, May 4, 2015, in New York City.

Rihanna attends the 'China: Through The Looking Glass' Costume Institute Benefit Gala at the Metropolitan Museum of Art, May 4, 2015, in New York.

Sarah Jessica Parker attends the "China: Through The Looking Glass" Costume Institute Benefit Gala at Metropolitan Museum of Art, May 4, 2015, in New York.

Emma Stone attends the "Charles James: Beyond Fashion" Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York.

Lupita Nyong'o attends the "Charles James: Beyond Fashion" Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York.

Blake Lively attends the "Charles James: Beyond Fashion" Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York.

Anne Hathaway attends the Costume Institute Gala for the "PUNK: Chaos to Couture" exhibition at the Metropolitan Museum of Art on May 6, 2013 in New York.

Kanye West and Kim Kardashian arrive at the Metropolitan Museum of Art's Costume Institute Gala benefit in honor of the museum's latest exhibit, "Punk: Chaos to Couture," May 6, 2013 in New York.

Jennifer Lawrence attends the Costume Institute Gala for the "PUNK: Chaos to Couture" exhibition at the Metropolitan Museum of Art on May 6, 2013 in New York.

January Jones attends the "Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala at the Metropolitan Museum of Art on May 7, 2012 in New York.

Emily Blunt attends the "Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala at the Metropolitan Museum of Art on May 7, 2012 in New York.

Beyonce Knowles attends "Alexander McQueen: Savage Beauty" Costume Institute Gala on April 2, 2011 at the Metropolitan Museum of Art in New York.

Jennifer Lopez attends the Costume Institute Gala Benefit to celebrate the opening of the "American Woman: Fashioning a National Identity" exhibition at The Metropolitan Museum of Art on May 3, 2010 in New York.

Marc Jacobs and Kate Moss attend "The Model as Muse: Embodying Fashion" Costume Institute Gala at The Metropolitan Museum of Art on May 4, 2009 in New York.

Kate Hudson attends "The Model as Muse: Embodying Fashion" Costume Institute Gala at The Metropolitan Museum of Art on May 4, 2009 in New York.

Gisele Bundchen attends the Metropolitan Museum of Art Costume Institute Gala "Superheroes: Fashion & Fantasy" at the Metropolitan Museum of Art, May 5, 2008 in New York.

Katie Holmes attends the Costume Institute Gala celebrating "Superheroes:Fashion and Fantasy" at the Metropolitan Museum of Art in New York on May 5, 2008.

Cameron Diaz leaves the Metropolitan Museum of Art's Costume Institute Gala May 07, 2007 in New York.

Sarah Jessica Parker attends the "Costume Institute Gala" celebrating "AngloMania: Tradition and Transgression on British Fashion" at Metropolitan Museum of Art in New York on May 1, 2006.

Scarlett Johansson attends the "Dangerous Liaisons: Fashion and Furniture in the 18th Century" Costume Institute benefit gala at the Metropolitan Museum of Art April 26, 2004 in New York.