Models Coco Rocha, Hilary Rhoda, Doutzen Kroes and actress Riley Keough attended the the 2010 Costume Institute Gala to celebrate the launch of American Woman: Fashioning A National Identity at the Metropolitan Museum of Art, New York City, Monday, May 3, 2010.

Coco Rocha in a dress by Zac Posen.

Hilary Rhoda in a dress by Prabal Gurung. Jewelry: Cartier. Shoes: Christian Louboutin. Clutch: VBH.

Riley Keough in a dress by Thakoon for Gap. Jewelry: Tom Binns. Shoes: Christian Louboutin.

Doutzen Kroes in a dress by Zac Posen. Jewelry: Tiffany & Co. Shoes: Christian Louboutin.