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Xtina gets birthday kiss from Kylie Jenner, who's dressed as Xtina


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Corrections & clarifications: An earlier version of this story had the incorrect age for Christina Aguilera. She turns 36 on Dec. 18.

What would you do if someone dressed like you and wanted to give you a birthday smooch?

Well, if you're Christina Aguilera reacting to Kylie Jenner, you playfully pucker up.

To celebrate Aguilera's 36th birthday, which is Dec. 18, Jenner, 19, revived her Dirrty-era Xtina costume and partied with Aguilera on Saturday. The soiree had plenty of balloons and pink, which complemented Aguilera's hairdo.

Jenner wore a similar chaps outfit for Halloween, and Aguilera gave it her seal of approval.