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Slide 4 of 7

Kiss 'n' Tell

Scarlett Johansson has been Woody Allen's muse for a few years now, and if we asked her new hubby Ryan Reynolds, we can assume he'd say she's his muse, too. But who else credits Scarlett as her creative inspiration? Katy Perry! She cites Scarlett's luscious lips as her motivation behind her hit "I Kissed A Girl." What does Scarlett think about Katy's crush? "That's flattering, but my lips are kind of taken," she tells the December issue of Allure. "I had no idea [about the song]. I should get a cut!"

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