Fitness addict, Khloe Kardashian has shared some eye popping photos of her working out in  high cut swim suit and a pair of Nikes during her family trip to the Caribbean island this summer on her new app.

Khloe, 31, titled her latest post, “All about that bass, get acquainted with my St. Barths booty”.

"There's no such thing as a vacation from fitness, so I made sure to schedule in a workout during my St. Barths getaway last month. I went for a run in my bathing suit and Nikes", the reality star added.

James Harden’s girlfriend has been working up a sweat with celebrity trainerGunnar Peterson for months now, shedding almost 40 pounds so far.