Khloe Kardashian Admits Struggle Growing Up With Sisters Kim and Kourtney: 'How the F**k Am I the Chubby One?'

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Khloe Kardashian is getting candid about how comparing herself to her older sisters, Kim and Kourtney Kardashian, affected her self-esteem growing up.

In a preview of her new series, Revenge Body With Khloe Kardashian, the 32-year-old reality star meets a woman named Stephanie, who says she not only feels insecure about her weight, but about her acne as well. Khloe shares that she actually didn't get acne until she was in her 20s, and then compares herself to her famous siblings.

"I was so insecure," Khloe acknowledges. "And my sisters have had the most beautiful skin their entire lives, like, not even a pore. I was like, 'How the f**k am I the chubby one? The this one, the that one, it's not fair!' But, that stuff's all fixable."

WATCH: Khloe Kardashian Says She 'Really Thrived' When Kim Kardashian Put on Pregnancy Weight

Revenge Body With Khloe Kardashian
follows the makeovers of contestants looking for the ultimate transformation, inside and out. Each of the six one-hour episodes will focus on two individuals who will get the opportunity to recreate themselves with the help of a team of Hollywood's most elite trainers, stylists and glam squads assembled by Khloe. The show premieres on Jan. 12 at 8 p.m. on E!

Of course, Khloe knows all about getting a hot revenge body. The Keeping Up With the Kardashians star has gone through a stunning body transformation, and has impressively kept the weight off.

"I was going through my divorce, and I just really needed an outlet," she told Health magazine last month about what kicked off her weight loss. "I had turned to food and had an unhealthy relationship with food my whole life. So, I joined Equinox, and I would go there and put my headphones on and get on the elliptical or the stairs, and no one would bother me."

Khloe then compared herself to 36-year-old Kim.

"Kim can eat anything, and I'm like, 'I hate you,'" she joked. "The nutritionist was like, 'Kim has a body like a Ferrari, and you have a body like a Honda.' I was like, 'Yep, that sounds about right. That's my life -- you just summed it up right there.'"

WATCH: Khloe Kardashian Kisses, Grinds on Tristan Thompson in Sexy New Year's Pics

In November, Khloe said she felt like a "hippopotamus" while stepping out with 37-year-old Kourtney at the Angel Ball in New York City.

"Kourtney will not stop videotaping me, and I look literally like a hippopotamus and a whale had a baby. Mind you, [makeup artist Mario Dedivanovic] said I look like a f**king ice skater, while Kourtney looks like gorgeousness..." Khloe said over a series of selfie videos.

"I'm like a f**king beached whale and you're making it more difficult," she later told Kourtney as her sister continued to videotape her.

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