Only a year after giving birth to her first child, Kourtney Kardashian is looking super svelte, and, according OK! Magazine, she's currently in the best shape of her life.

The eldest of the Kardashian sisters, Kourtney is on the cover of OK! this week rocking a tiny blue bikini and showing off completely flat abs and an overall lean physique.

"I love my new body," the 31-year-old tells the magazine. "They say that it takes a full year to really get your body back [after giving birth] and I believe that."

Earlier this year, Kourney complained that OK! Photoshopped her post-baby body and made her look unrealistically thin after putting on 40 lbs. during her pregnancy.

Inside the issue, Kourtney dishes on her new exercise and diet plan, which is said to mix "healthy choices with a few splurges."