June 16, 2016 12:15 PM

She’s one of the most famous faces in the world, but even Kim Kardashian West succumbs to self-comparisons now and then.

The reality star, who gained 60 pounds while pregnant with son Saint, now 6 months old, tells PEOPLE exclusively that she struggled seeing other women bounce back quickly after pregnancy.

“I see my friends like Chrissy [Teigen], who I love to death, and I’m like, ‘Chrissy, I want to kill you. How do you do it?’ ” jokes Kardashian West of the Lip Sync Battle host, who stepped out in tiny short shorts just weeks after giving birth to daughter Luna in April.

Matt Crossick/PA Photos/ABACAPRESS; Jeff Kravitz/B

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“She’s a model,” Kardashian West, 35, who is also mom to 3-year-old North, adds. “I think tall skinny models have it easy!”

The entrepreneur and social media queen isn’t doing too badly herself. She’s lost all of her baby weight, and is on track to have “the body of my dreams,” she says. “I’ve worked my ass off to get here!”

For exclusive photos and much more from Kim Kardashian West, pick up the latest issue of PEOPLE, on newsstands Friday.

— Aili Nahas

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