Kourtney Kardashian Proudly Debuts Slimmed-Down Post-Baby Bod — See Her Abs!

Hopped up out the bed, turn my swag on Took a look in the mirror said what's up?

A photo posted by Kourtney Kardashian (@kourtneykardash) on Jun 18, 2015 at 11:07am PDT

Abs-olutely, 100 percent worth a social media brag. Kourtney Kardashian posted a mirror selfie on Thursday, June 18, and looked seriously slimmed down since welcoming her third child, son Reign, this past December.

“Hopped up out the bed, turn my swag on Took a look in the mirror said what's up?” the 36-year-old mom of three proudly captioned the snap, in which she dons only a bra top and pajama bottoms, showing off her trim stomach.

Scott Disick’s longtime love looked equally as slim stopping by the Dash store in West Hollywood on Tuesday, June 16. “May I get a moment of silence for @kourtneykardash?!?! Yaaassssssssss!!!! Go off!!!!,” her sister Khloe captioned an Instagram of Kourt from the same day, looking tiny in a black jumpsuit while exiting a car.

“Like wtf how is this possible,” one fan commented on the reality star’s mirror selfie, while another equally mystified follower added: “Didn't she have kids?? Looks like she ain't had 1.”

The eldest Kardashian — who credits eating clean and working out with a trainer — has been using throwback photos of herself as motivation. “After three days off track, tomorrow it's back on. #mondaymotivation,” she captioned an old photo of herself looking svelte in a teeny bikini.