The 26-year old model said she wants to feel sexy again in a two-piece suit - and is determined to shed the excess pounds by the time she goes on a holiday to Mexico.
"That's my mission. I'm going to Mexico in June," the daily Mail quoted her as telling America's People magazine. I'm in a working-out process and I'm definitely back on trying to lose weight.
"It's about being healthy, though. I believe in working out, eating well I do everything in moderation. I don't like people who do extreme, crazy diets," she said.
The youngest Kardashian sister said she also wants to be a role model to others with similar struggles.
"I don't know if people think celebrities don't have insecurities, but everyone does," she said.
"Mine personally is weight. I could be as skinny as ever but to somebody else, I may not ever be good enough.
"My weight fluctuates, and I accept that and it's my life struggle, but I just wanted to point out that I'm normal, and everybody has their own things," the star added. (ANI)