Khloe & Kourtney Kardashian Show Off Abs In Sexy 'Gym Selfie'

Keeping up with Khloe and Kourtney Kardashian requires some serious gym time – but from the looks of it, the hard work will pay off.

Khloe posted a photo of herself and Kourtney working on their fitness on Saturday.

Sporting matching black leggings and ab-revealing sports bras, both sisters pulled their waistbands down to reveal toned tummies in the shot.

Gym selfie with the MILF

A photo posted by Khloé (@khloekardashian) on

"Gym selfie with the MILF," Khloe captioned the pic.

Khloe, whose new show, "Kocktails with Khloe," premieres Jan. 20 on FYI, also posted a photo celebrating a new social media milestone after reaching 40 million Insta followers.

"40 Million Followers COME THROUGH!!!!! Cheers my loves! Cheers to your happiness and dancing in the rain!!! ❤," she captioned a sexy shot of herself with sister Kendall and Kylie Jenner.

40 Million Followers COME THROUGH!!!!! Cheers my loves! Cheers to your happiness and dancing in the rain!!! ❤️

A photo posted by Khloé (@khloekardashian) on

-- Erin O'Sullivan

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