Kourtney Kardashian Steals Kim K.'s Lacy Slip Dress Look: Who Wore It Best?

Giving Us the slip! Kourtney Kardashian stole a page out of sister Kim Kardashian's style book when she wore the same lacy dress as the Selfish author.

The mom of three, 37, rocked the My Style Mode Black Lace Trim Satin Mini Dress ($60, mystylemode.com) in an Instagram photo posted on Monday, September 26. She paired the steamy lingerie-inspired frock with a lace choker.

Kourtney wore her hair in a high, artfully disheveled ponytail with the outfit and worked in a pop of color with a coppery smoky eye and pinky-nude gloss.

The Keeping Up With the Kardashians stars have obviously been spending time in each other's closets — or just have the same shopping tastes — because Kim, 35, was spotted in the same garment first, on July 15.

The mom of North, 3, and Saint, 9 months, sported the plunging semi-see-through number with an oversize black windbreaker, minimalist heels and statement shades.

Kim has been all about playfully showing off her body recently, even writing about her new skin-baring style on her website. "I have always loved sheer," she wrote in a post about her frequent cheeky looks. "I just don't GAF, LOL."

Who wore the teeny-tiny dress best — Kourtney or Kim? Tell Us in the poll below!

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Kourtney Kardashian Steals Kim K.'s Lacy Slip Dress Look: Who Wore It Best?

Who Wore It Best?

Kourtney Kardashian Steals Kim K.'s Lacy Slip Dress Look: Who Wore It Best?