The oldest sibling in the Kardashian-Jenner clan, Kourtney Kardashian, has often been known as the tough-love sister. Mom to three [1], health nut, workout advocate, and clean freak, the eldest sister is also funny, cool, and definitely a blast to hang out with (or so I would like to imagine).

However, she may also be the Kardashian selfie queen, giving Kim a run for her money when it comes to posting the self-posed shots. And while it may be common knowledge that Kourt is pretty stunning, we're pretty sure these photos may make this beauty (who seemingly doesn't age [2]!) the sexiest sister of them all.

Catch up with all of Kourtney's sexy self-portraits [3] so far this year, but we're pretty sure that the best is still yet to come.