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The Best-Dressed Stars This Week: 5/23/13

Alessandra Ambrosio kept it sexy in Cavalli in Cannes, while Emma Roberts partied it up in Camilla and Marc in the big apple—see who else topped our most stylish star list this week!

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Who do you think was best dressed? Sound off in the comments below or on Twitter @OKMagazine!

Sound off in the comments below!

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