Kim Kardashian posts sexy Instagram in her underwear

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Kim Kardashian is taking Instagram ads to a whole new level!

The KKW Beauty founder took to Instagram on Tuesday afternoon to share a super-sexy photo of herself wearing white underwear and a matching, barely-there crop-top.

SEE ALSO: Kim Kardashian sets Instagram ablaze with topless photo in bed

In the sultry snap, Kardashian is seen drinking milk in an industrial kitchen. The post is an ad for Flat Tummy Co's Shake It Baby program, which the reality star revealed she's currently on the ninth day of following a "massive Christmas" that made it "impossible to fit in my regular work outs and eat healthy."

See Kim Kardashian's head-turning post in the gallery below:

"Little update for you guys," she captioned the shot. "I’m on Day 9 of my Shake It Baby program from @flattummyco and I’m actually feeling so good. We had a massive Christmas this year and between my Mom's party, Christmas and New Years... I felt like it was impossible to fit in my regular work outs and eat healthy."

"But this program is giving me a kick in the right direction that I need," she went on. "These meal replacement shakes are so good and it’s helping me get my tummy back to flat in the new year. The results I’m seeing and feeling are amazing and I’m so excited for the next few weeks. Because they’re all about getting women back on track."

The sexy shot comes four days after Kardashian turned major heads by posting a topless photo of herself laying in bed wearing just underwear.

The duo of skin-baring photos are her first majorly eyebrow-raising Instagram posts of the year, but she made her fair share of headlines in 2017 for the same reasons.

Check out Kim Kardashian's sexiest Instagrams of 2017:

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