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The "I Kissed a Girl" hitmaker, who is engaged to British funnyman Russell Brand, fought off tough competition from "Transformers" babe Megan Fox, "Avatar" stunner Zoe Saldana and racy singer Rihanna to top the coveted annual poll.
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Also featured in the top 10 are Brooklyn Decker, Blake Lively, Elisabetta Canalis, Olivia Munn, Kim Kardashian and Marisa Miller.
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