Sandra Bullock, Katy Perry, Gwen Stefani, & more of this week's best & worst celeb style

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From NYC premieres to Paris Fashion Week, the stars were out in full force this week. Sandra Bullock glowed in white at the premiere of "Gravity" and Kim Kardashian stunned, showing major skin in Paris. Some celebs, like Katy Perry, were total flops, while others looked absolutely fab

Click through the gallery above to check out the best and worst of this week's celeb style!

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