Kendall Jenner may kick butt in the modeling world, but that doesn't mean the 19-year-old is all work and no play!

The reality star recently posted a bikini photo to her Instagram, showing off her tanned body while lounging poolside. While we're not sure what Kenny's doing with her necklace (trying to fit it in your belly button, perhaps?), there's no denying that she looks GOOD!

Scroll down to see more celebs' bathing suit pics!