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Hot mama, indeed!

On tonight's brand-new episode of Keeping Up With the Kardashians, Kourtney Kardashian strips down to nothing for a super-sexy naked photo shoot with artist Brian Bowen Smith.

"The whole vibe of the shoot, other than it's going to be nude for the art thing, is that if you're not blown away by your picture, then it means we didn't do it right," Smith tells Kourt.

"The only thing is I feel like my ass like disappeared when I lost weight," Kourtney laughs. "We need to plump it up!"

Kourtney Kardashian, KUWTK

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"You'll be pleasantly surprised how nice your ass is going to look," Smith assures her. "We want to make your sisters jealous."

Kourtney's little sis Kylie Jenner arrives to support her. "Oh my god, you're so skinny!" Kylie gushes before Kourtney takes it all off! Kourtney flashes her boobs, butt and more while striking different sexy poses for Smith. Hot damn! 

Kourtney Kardashian, KUWTK

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Watch the clip for yourself to see just how much skin Kourtney shows during the risqué shoot. 

Watch Keeping Up With the Kardashians Sunday at 9 p.m., only on E!

Kourtney Kardashian, KUWTK

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