Who Wore It Best: Rachel vs. Jessica?

Collar up or down? Back in October, Rachel Weisz attended The Brothers Bloom premiere in London in Roland Mouret's black and cream assymetrical dress with black pumps, a sleek updo and the flowing collar up. This past weekend, Jessica Alba wore the same dress to the Vanity Fair Oscar party with a gold clutch, black peep toes and the cream collar off her shoulder.