The original Grease movie may have premiered 38 years ago, but the characters (and costumes) have proven to be timeless — especially when it comes to Halloween. Everyone from Gigi Hadid to Chris Brown have transformed themselves into Pink Ladies and T-Birds on All Hallows' Eve, and we're kind of obsessed!

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Click through the gallery to see all the celebrities who've worn Grease-inspired outfits for Halloween.