Kylie Jenner dusted off her vintage Christina Aguilera costume that she wore on Halloween, to attend the "Dirrty" singer's 36th birthday party on Saturday. And after a few pics (and maybe a few drinks), it was kind of hard to tell the two apart.  

The 19-year-old reality star took to Instagram today to share a number of videos and photos from the luxurious event. One photo showed Kylie wearing the signature bikini top and cut out pants while sitting on Xtina herself. The "Lady Marmalade" artist was fashioning an elaborate costume with a colorful fur coat and a pink wig that sort of resembled a hair style Elizabeth Banks' character in the Hunger Games would wear. Kylie also shared a video of the two turning up together to the 1988 hit, "Da Butt." 

Many fans took to Twitter to cheer on Kylie's impersonation of the pop icon.

The reality star originally wore an outfit similar to this one during Halloween weekend earlier in the year, accompanied by Tyga, who was dressed like Juelz Santana. Christina originally expressed her approval of the costume on Instagram