The 19-year-old lip kit creator celebrated Christina‘s 36th birthday party in full costume.
“When XTINA wants u to dress as XTINA for her bday you do it!” Kylie wrote on Snapchat.
Remember when she dressed as the pop singer for Halloween?
Meanwhile, Kylie took photos with Christina and her husband Matthew Rutler, and even kissed her on the lips!
Kylie brought along her BFF Jordyn Woods.
Click inside to see more videos from Christina Aguilera’s birthday bash…