Kendall Jenner Flashes Her Nipple Ring at Gigi Hadid’s Star-Studded 21st Birthday Party — See the Pics!

Gigi Hadid celebrated her 21st birthday with a celebrity-filled bash — including an appearance by Kendall Jenner's nipple ring.

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The 20-year-old model was captured on sister Kylie Jenner's Snapchat showing off her racy outfit complete with a sheer lace bra, which failed to cover her intimate piercing.

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Along with the KUWTK star, Taylor Swift showed off her wild side at the party held at LA hotspot The Nice Guy, wearing a sequined black mini dress with platform boots and a platinum blonde shaggy bob.

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Gigi definitely knows how to throw a party. Click through the gallery below for more snaps from the supermodel's big night!