Lady Gaga, the Kardashian sisters, Katy Perry & more of this week's best & worst dressed celebs

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From charity events to premiere parties, celebs were out in full force this week looking hot, and in some cases, not so hot. From Kim Kardashian's sexy lace number to Katy Perry's casual airport outfit, we've rounded up all of this week's best and worst celeb looks.

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

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