The Keeping Up With The Kardashians star posed in her gym gear yesterday as she told fans that she wanted a perky bottom like Khloe.
In fact, despite pregnant sister Kim being well-known for her voluptuous body and gravity-defying bottom, Kourtney wanted to achieve a similar look to Khloe, who has recently been stealing Kim's crown!
Kourtney said via Instagram: "Today's mission: to get my butt looking like @khloekardashian's!!"
Khloe's shapely derrière, which is in part thanks to her intense fitness regime and use of a waist trainer, has become a much-talked about topic in celebville.
Remember in May last year when Kim and Khloe compared bottoms on the red carpet? In fact, who could forget in October 2013 when Kim showed off her bottom in a belife wearing a white swimsuit?!
It definitely runs in the family!
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All you need to know about Kourtney Kardashian: