Jessica Alba, Naomi Watts at Oprah Hosts an Evening With Ralph Lauren

When Oprah Winfrey joins forces with Ralph Lauren, you can bet the industry giants are going to draw a crowd. So, while Hollywood partied the night away in Beverly Hills, the style crowd rivaled with their own fashionable fête, benefiting both the Ralph Lauren Center For Cancer Care and Prevention in Harlem and Lincoln Center For the Performing Arts in NYC. The black-tie affair gave good cause for suiting up in Ralph Lauren's glam gowns, and we spotted our style favorites like Camilla Belle, Chanel Iman, and Jessica Alba doing just that. Click through to see who wore what, and tell us who would get your vote for best dressed.