kimquicktrimpic1.jpgkimquicktrimpic2bright.jpgQuicktrim

Kris Humphries reportedly called his wife of 72 days a "fat a**," but now Kim Kardashian is showing off her rock hard body in these new images from her upcoming exercise video with QuickTrim.

The 31-year-old reality starlet is sporting some unconventional workout gear ... including a pleather-looking wide belt and low cut top. In the bottom outfit, it appears her breasts are popping out in a pink bra. Sheesh!

Could this video be a jab at her soon-to-be ex Kris Humphries who made the following joke about her weight: "God, you ate a lot of wedding cake." Looks like Kim isn't sweating it!

The DVD is set to hit stores in the UK on December 26.