I mean, what better way to celebrate a birthday than with some acid-injected, lip-on-lip action, right?
On Saturday, Kylie showed up to party with Christina, dressed in the very same outfit that Christina wore in 2002 for "TRL Presents: Christina Aguilera Stripped In NYC" when she performed at Brooklyn Bridge.
Well, imitation is the sincerest form of flattery, and flattery is the quickest way to woman's heart, so maybe that's how these two ended up kissing that night.
Admittedly, it was a pretty chaste kiss, all things considered.
Kylie posted a video of the moment on her Instagram.
Yep, that's a kiss on the mouth, all right.
But just in case, let's check out the play-by-play for confirmation:
First, Kylie climbs into Christina's lap.
Then, Kylie, not wasting any time, just goes for that kiss.
At first, it seems like Christina is only expecting a kiss on the cheek.
But Kylie is determined to get that lip action, and turns Christina's head toward her.
Honestly, it's a little awkward, but I'm happy Kylie got her kiss in the end.
Listen, I ship it.
I know Kylie's only 19 and probably a little young for Christina, but anyone's better than Tyga.
A little over a month ago, the reality star dressed up for Halloween as Christina Aguilera from her 2002 "Dirrty" music video.
That flattery totally worked on Christina, as well, because the 35-year-old pop star posted a picture of the costume on Instagram and wrote,
"YAASSSSS".....Killin it @kyliejenner yes to dirrty 2016!! Get it girrrl!!!
Smart, Kylie, very smart.
I'm just saying, the girl knows how to woo her crushes. It's 100 percent working.
I'm officially a #Khristina shipper now.