Who's the Best-Dressed Star?

Weigh in on the style of Jennifer, Beyoncé, Jessica and 17 other celebs – then see who makes the top of the list in PEOPLE's Best & Worst Dressed issue, on newsstands Sept. 15. By Serena Kappes and Melissa Liebling-Goldberg

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JESSICA ALBA

Alba's everyday style is about pairing simple pieces (left, a Derek Lam for Tod's dress with leggings; right, a cropped Jak & Rae jacket with jeans). But the actress can also glam it up, as she did in Versace at this year's Oscars (center).