Kim Kardashian has been all about fitness lately with her new Work Out DVD ready to hit shelves.

She just posted behind the scenes pics at her Muscle and Fitness shoot and wrote:

“I have been going sooo hard in the gym, and I really feel it’s paying off! My tummy is soo toned. Why is it that the top part gets ripped first and the lower part is sooo hard to tone up!? I am determined to have a six pack by summer! In a feminine way of course.”

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Tags: Kim Kardashian