Have you seen Khloé Kardashian's butt lately? Chances are, it's bigger than the last time you saw it.

We happen to be mesmerized by the 30-year-old's famous behind. Just yesterday, the reality star took her extremely perky tush to the gym and made sure to dress in a pair of super tight spandex leggings so we could see just how in-your-face her derriere truly is.

khloe butt

But that's not the only time KoKo's made us do a double take — click through to see her impressive booty transformation!