You guys, remember when Kylie Jenner dressed up as Christina Aguilera for Halloween? That was amazing, right? You have to admire the dedication and attention to detail that a tribute like that takes. (Also, the money and the team of stylists, but whatever!)
Well, Kylie's efforts did not go unnoticed—or unrewarded. In fact, at XTina's birthday party on Saturday night, things got a little dirrrty. The two shared a super sassy kiss!
Happy Birthday from Kylie and Christina's tongues!!! Bday behavior, for real!
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This article originally appeared on Cosmopolitan.com. Minor edits have been made by the Cosmo.ph editors.