UPDATE 12:50 P.M. EST: Khloé Kardashian took to Twitter on Monday morning following her wild night out with Kourtney Kardashian!
Issuing an apology to her older sister for catching her peeing on camera, the starlet wrote:
Khloé Kardashian and Kourtney Kardashian definitely out-partied their little sis Kylie Jenner at her Kylie Cosmetics Birthday collection launch!
We previously reported how the 18-year-old threw a big bash on Sunday night to celebrate the new launches, which was attended by all of her sisters.
Related: Khloé Fires Back At Haters Claiming She's "Too Skinny"
Well, according to both their Snapchat stories last night, things got LIT!
Not only were the single reality TV starlets talking about how Kourt has sex for just 24 cents (LOLz!) as she was escorted out, but Khloé even caught her big sis peeing on camera!
U think they pre-gamed beforehand?? Ha!
Catch some of those snaps (below):
Tags: alcohol, beauty buzz, drunk, gifs, highlarious, khloe kardashian, kourtney kardashian, kylie cosmetics, kylie cosmetics birthday launch, kylie jenner, party poppin', sex, snapchat, wasted