Kim Kardashian fired back against those who have accused her of undergoing surgery when she replied to a fan's tweet on Friday.

A fan tweeted the star and wrote, "Stop #hating people! Why is it so hard to believe she works out hard for her body? Let her be skinny in peace! You look great!"

To that the reality star said, "It sucks when people make up surgery or photoshop lies when I am so disciplined & work so hard! Just trying to motivate others & show anyone struggling with weight they can totally achieve whatever they want if they are dedicated!"

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The 33-year-old has been accused of going under the knife since giving birth to her daughter North West in June 2013. Reports stated that Kardashian had procedures done to flatten her stomach shortly after she welcomed the newborn. More recently, Kanye West's fiancee was also accused of altering Instagram photos to make herself look thinner.

The star previously debunked the surgery claims via social media and explained that she's worked hard for her post-baby results.

"I am very frustrated today seeing reports that I got surgery to lose my baby weight! This is FALSE," she tweeted in November. "I worked so hard to train myself to eat right & healthy, I work out so hard & this was such a challenge for me but I did it!!!"

She added: "I'm so proud of my accomplishment & NO ONE will take this away from me with fake reports! Say what u want about me but I work hard & am the most disciplined person u will ever meet!"

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Kim Kardashian