The stars were out at last night's "Get Him to the Greek" premiere -- and while Russell Brand, Zac Efron, Vanessa Hudgens, Diddy and Jonah Hill all turned out, Katy Perry's leg stole the show.

Katy's stems were more-than-peeking out of her silver Georges Chakra gown.

Check out the rest of the red carpet fashion, then let us know ...

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