UNDERCOVER MISSION

The Post puts Hollywood’s fave underwear to the test with some of this season’s sexiest silhouettes

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ETWEEN the two of them, Hollywood stylists Simone Harouche and Jamie Mizrahi have more than 20 years of experience bedecking the bods of A-listers, including Kim Kardashian, Katy Perry and Miley Cyrus.

That means they’ve taped a lot of boobs.

This fall, they launched their own expansive collection of underpinnings called the Kit: all kinds of stretchy, smoothing, securing tools, inspired by the ones Mizrahi and Harouche use during fittings.

It’s already beloved by celebs: Kate Hudson, Karlie Kloss and Kourtney Kardashian have all posed in their Kit undies on Instagram. But the items — which start at $14 — are meant for mere mortals. There’s a style of seamless tap shorts beloved by J.Lo for coverage under super-short skirts, six (!) different bras to accommodate different necklines and boob tape that promises to stay put for a fourhour awards show. You’ll even find a “pretty sticky” adhesive thong, which is less scary than it sounds — and handy for rocking bodyconscious silhouettes sans pantylines. “Just tape it on the front, tape it on the back, there’s nothing on the sides and you’re good to go,” Harouche tells The Post. So even if you’re not posing in a skintight gown at the Met

Gala or belting out a hit in booty shorts on stage, there’s much to learn from the red-carpet veterans on what to wear underneath sexy holiday party looks. Here, The Post’s stylists take their products for a test run on some fierce and festive silhouettes.

Kourtney Kardashian (above left) and Karlie Kloss (above right) are among dozens of stars who have posted Instagram selfies in the Kit, a new line of undergarments designed by celeb stylists Simone Harouche and Jamie Mizrahi (inset).