We're not fooled into thinking this is just a growth spurt! Growth spurts don't occur only in your butt and nowhere else!

Kylie Jenner dropped by the family offices in Calabasas yesterday, and it appeared as if the reality star was doing everything she could to highlight her much rounder derriere in a pair of tight bell bottoms that she paired with a crop top. First off, who wears heels with bell bottoms? Second of all, there is no way her booty is natural.

We think the plump buns genes comes from the Armenian side of the Kardashian clan, as Kourtney, Kim, Khloe, and Rob all have big asses. The Jenner side has much more of an athletic body type, and all you have to do is look at her sister Kendall to realize the Jenners aren't built to be curvy. Therefore, the logical conclusion would be that she is injecting some sort of filler into her backside.

It's not like she's a stranger to plastic surgery! Tyga's underage girlfriend is so slowly morphing into her older sister Kim with her lip injections, obvious boob job, and face fillers, so a little injection in the tush is no big deal!