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Socialite-turned-fashionista Nicole Richie looked fabulous as she channeled Old Hollywood in a retro glam look at the star-studded Baby2Baby gala on Sunday night. What do you make of the hot mama's '20s-inspired 'do, which she perfectly paired with a patterned Lorena Sarbu gown, stacked bracelets, and a House of Harlow clutch? Hot or not? (11/4/2012)

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This week's best-dressed crew includes Nicole Richie, Cameron Diaz, and Kristen Stewart. -- By Matt Whitfield, Yahoo! Staff