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OTRC: Kim Kardashian talks sexy selfie, 50-lb weight loss, Kanye West

Kim Kardashian poses for photos in a dressing room, wearing her engagement ring, before appearing on NBC's 'Tonight Show With Jay Leno' in Burbank, California on Oct. 30, 2013. She and Kanye West got engaged on Oct. 21, 2013. (Michael Simon / Startraksphoto.com)

Kim Kardashian says a sexy selfie she posted on her Instagram page earlier this month marked her "middle finger to the world," namely the people who mocked her over her pregnancy weight, which totaled 50 pounds.

The NSFW photo, which shows the 32-year-old reality star wearing a skimpy, white swimsuit, has been "liked" more than 1 million times since it was posted on Oct. 16. It also spurred a suggestive tweet from Kanye West, her boyfriend and father of their 4-month-old daughter, North.

"I was trying on a bathing suit and I actually just sent that to my boyfriend, or my fiance, and I was like, 'Babe, can I post this up?'" Kardashian told Jay Leno on his NBC talk show "The Tonight Show with Jay Leno" on Wednesday. "This is my big, like, middle finger to the world on everyone that called me fat."

Check out 5 more things she revealed during her interview with Jay Leno.

1. Kim Kardashian gained 50 pounds during her pregnancy -- then lost it.

"It's honestly, I think, the greatest challenge of my life to have gained 50 pounds and actually, I got on the scale today and it said that I am 50 pounds down," she told Leno.

"I will say it was the hardest challenge of my life and I was dedicated and I was motivated and I did the Atkins diet," Kardashian said, adding that she also lost weight by going on hikes with her family members and West.

(Check out a PHOTO of Kim Kardashian out in public while pregnant, as well as pictures of other celebrities who lost a lot of weight.)

2. Nasty comments about her weight "hurt my soul," Kim Kardashian says

Kardashian told Leno that unflattering paparazzi photos of her that were taken while she was pregnant and nasty comments about her weight caused her to avoid going out in public as often as she used to. The reality star is often seen at celebrity and other social events in Los Angeles.

"It really hurt my soul, like it changed how I am I think in the public a little bit. It's like, I would go out and there would just be photos of me, like anytime I was hungry ... stories where I was like 200 pounds," she said, adding: "I've definitely tried to live more of a private life because of that, because they were so nasty."

3. Kim Kardashian's wedding plans

Kardashian told Leno that she and West, who got engaged on Oct. 21, are "hoping" to wed in summer 2014 and may exchange vows "somewhere destinational." This will be her third walk down the aisle and the hip-hop star's first.

"Some place like Parisian," Kardashian said. "I got pregnant when we were in Italy -- maybe Italy -- we haven't even talked about it. But I want something really special. Maybe I'll pick the place and then he can plan it. Full compromise."

4. Who will walk Kim Kardashian down the aisle?

Leno asked the reality star if her stepfather Bruce Jenner will walk her down the aisle, given that he and her mother Kris are separated.

"Of course," Kardashian said. "He is my stepdad."

5. About that ring ...

Kardashian also talked about the 15-carat, cushion-cut Lorraine Schwartz diamond engagement ring that West gave her.

"He did really good," she said, "I mean, I know he has good taste. I think he went to 4 jewelers to make sure he found the absolute best."

Watch videos of Kim Kardashian's interview on "The Tonight Show with Jay Leno" below and also RATE her outfit, from 1 to 10! She is wearing a long-sleeve, white lace Dolce & Gabbana see-through dress from the designer's Fall 2013 Ready-To-Wear collection.

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