Kylie Jenner is getting in touch with her inner Christina Aguilera… again.
The 19-year-old reality star joined the pop singer for an early birthday bash (Aguilera turns 36 on Dec. 18), where she flawlessly channeled Xtina's 2002 "Dirrty" days -- specifically, the yellow-and-black bikini top and assless chaps worn by the singer during MTV's TRL Presents: Christina Stripped in New York City.
In true "bday behavior" fashion, party attendees danced to hits by Juvenile and Jay Z while noshing on an endless array of sweet treats including a three-tier cake complete with doughnuts, lollipops, gumdrops and ice cream.
The Kylie Lip Kit creator brought along two of her closest friends for the soiree, Jordyn Woods and Tiffany Sorya. Woods rocked a sequined mini and what looks like one of Jenner's famous pastel wigs, while Sorya tapped into her animal instincts with a leopard-print catsuit.