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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NICOLE RICHIE

It's no surprise that Fashion Week is one of her favorite times of the year: The Simple Life star gets a kick out of experimenting with her look (left, in Karen Zambos Vintage Couture jump shorts; center, sporting an Alexander McQueen scarf; right, in Prada).