Kim Kardashian already slammed critics who claimed she was heavily Photoshopped in Fergie's "M.I.L.F. $" music video, and she's at it again, this time sharing BTS pics that prove her tiny waistline is 100% real.

"Working on the 'M.I.L.F. $' video with Fergie and all the other amazing women — Chrissy [Teigen], Ciara, Alessandra Ambrosio, Tara Lynn, Gemma Ward, Amber Valletta, Angela Lindvall, Natasha Poly, Isabeli Fontana and Devon Aoki — was so much fun!" she captioned one photo released on her app. "B. Akerlund styled me and she is SUCH a legend." In another, she seemingly explained who she got into the "Got MILF?" T-shirt and cutoffs combination. "Squeezing into this look was a full team effort! LOL," she wrote. "We had to put in work!"

It was previously reported that Kim was down 60 pounds post-pregnancy, and now she's revealed that she's dropped nearly 70 lbs. "I think dieting is so important to weight loss, whereas, I didn't really ever think that before," she told People. "I thought, 'Oh, I can work out, I can just eat whatever I want.' But you have to work out all the time."

Kim followed the Atkins 40 plan, which had her eating 1,800 calories a day. "We eat a lot of fish and turkey," she said. "It's a full modified thing. I worked with them in them sending me their snack stuff. And there would be this trail mix with M&M chocolates with peanuts, so there was stuff that makes it you feel like you can live. And not like super restricted to anything."

While Kim worked hard to shed the weight, she admits that her kids made it tough at times. "I started going to Disneyland and taking my kids and eating Churros and all that really crappy stuff that I love," she added. "But then you feel so sh*tty after you eat it, when you've been doing so good."

Kim added that her younger sister Khloe, who has dropped 40 pounds over the year, is her hero in all of this. "She does these workouts with these sauna suits underneath," Kim said. "And she's just. . . I've never seen someone so focused. I saw her naked two days ago changing. And I was, 'Oh, my God. You are my body icon.' She's never been more on fire."