Kim Kardashian has posted this sexy selfie photo wearing a tight white swimsuit showing off her round behind and sideboob.

The Keeping up with the Kardashians star’s sultry photo on Instagram on Wednesday flaunted what she has achieved with the Atkins diet she is using to get back to her pre-pregnancy weight.

In the Instagram photo with a “#NoFilter” caption, the 32-year old sexy star was wearing a body hugging swimwear that emphasized her famous behind. She also displayed plenty of sideboob in the said photo.

Five hours after she posted the photo on her Instagram account, hundreds of thousands people like it.

One fan commented, "Shake that ass Kim! You should be proud!" Another one said, "You look great!"

However, it was Kanye West, Kim Kardashian’s special someone, who really noticed her nice derriere. He even retweeted a link to the image captioning, “HEADING HOME NOW.”

Who can blame him? Not everyone who has given birth is given a chance to achieve a sexy body again. Considering that it was just four months after she gave birth to North West, the 25 pounds she lost since the stork has delivered her daughter on June 15, was surely a great achievement.

Aside from cutting carbs from her diet, Kardashian and her partner Kanye West heads out to the celeb favorite Barry’s Boootcamp for a joint workout session.

The healthy-minded couple even geared up with matching outfits for their calorie-burning sessions.

According to the bootcamp’s website, Kim and Kanye’s sessions focus on alternating between cardio and weight training.

Kim was also seen toning up at different Pilates Plus locations.

Kristi Vacanti, owner of Pilates Plus Los Angeles and head trainer recently told E! News, "Kim loves these exercises. It enables her to get a total body toning and calorie burning workout in, in under and hour so she can get back on with her busy day and baby North!"

No wonder she’s lost 25 pounds now. More to lose Kim!