She captioned the post: “Found this pic I took in the bathroom on set of My @calvinklein shoot #MyCalvins #ad.”(sic)
The Keeping Up with the Kardashian star looked phenomenal in a tight fitted two-piece when she posed in front of a bathroom mirror.
Curving her hips for the sizzling snap, Kim drew attention to her hourglass figure and shapely thighs.
Also, the 37-year-old’s impressive cleavage could not be missed in the strappy bra as it gaped open.
In fact, the sexy garment just about managed to support Kim’s ample bust, which looked as though it would spill out.
Placing one hand on her shoulder, Kim oozed sex appeal in the minuscule number and certainly seemed confident wearing it.
Surprisingly, Kim, who dubbed herself the selfie queen, hide her face behind her large smartphone.
The mother-of-three quite possibly chose to obscure her face to allow the outfit to take centre stage.
Kim’s adoring fans were in awe of her photograph and wasted no time in leaving her compliments in the comment section.
One admirer wrote: “You are so gorgeous!” while another added: “You have a nice body.”
A third said: “That underwear suits you,” and a fourth wrote: “So beautiful and gorgeous.”
Hours after posting her underwear picture, Kim uploaded her first family photo to the social media website.
Alongside the image she joked: “I don’t think you really understand how hard it is to take a family pic.
“This was all we got before all three kids started crying. I think I cried too.”
In the photo Kim snuggled up to her rapper husband Kanye West as they stood with their children, Chicago, two-months, Saint, two, and North, four.
Kim and Kayne welcomed their youngest child via surrogate in January and confirmed the news of her website.
“Kanye and I are happy to announce the arrival of our healthy, beautiful baby girl,” Kim wrote.
“We are incredibly grateful to our surrogate who made our dreams come true with the greatest gift one could give.
“And to our wonderful doctors and nurses for their special care. North and Saint are especially thrilled to welcome their baby sister.”