Hailey Bieber Channels the '90s in a Little Black Dress and Saint Laurent Slingbacks

She celebrated a decade of Kylie Cosmetics with spaghetti straps and a leg split.

Hailey Bieber attends Kylie Cosmetics party wearing Saint Laurent slingback heels and a black dress with a leg split
(Image credit: PGP / BACKGRID)

Hailey Bieber has a penchant for vintage fashion, and can regularly be found resurrecting chic '90s outfits. To celebrate a decade of Kylie Cosmetics, Bieber joined a plethora of celebrities in Los Angeles on Friday, October 17, opting to wear a little black dress and Saint Laurent slingbacks to the party.

The Rhode founder was photographed arriving at Kylie Jenner's party wearing a little black dress with a fitted bodice, a drop-waist belt, thin spaghetti straps, and a thigh-high leg split.

Bieber accessorized the classic LBD with Saint Laurent's Amalia Slingbacks, which feature a pointed-toe and retail for $2,050.

Hailey Bieber attends Kylie Cosmetics party wearing Saint Laurent slingback heels and a black dress with a leg split

Hailey Bieber wearing her LBD and slingback pumps.

(Image credit: PGP / BACKGRID)

Bieber—who is styled by Dani Michelle—was far from the only famous face supporting Kylie Cosmetics's all-important anniversary. Kylie and Hailey were joined by Kendall Jenner, Kim Kardashian, Jen Atkin, Khloé Kardashian, Mario Dedivanovic, Kris Jenner, and many others.

In contrast to Bieber's LBD, Kylie arrived at her party wearing a skintight baby pink latex dress, which she accessorized with $1,195 Amina Muaddi Barbara Leather-Trimmed Lace Pumps.

Kylie Jenner is seen arriving to Kylie Cosmetics pop-up event wearing a pink latex dress on October 17, 2025

Kylie Jenner celebrating a decade of Kylie Cosmetics in pink latex.

(Image credit: DUTCH/Bauer-Griffin/GC Images/Getty Images)

In honor of the iconic milestone, Kylie shared on Instagram, "you're the reason my biggest cosmetic dreams came true, and I wouldn't be here...10 years later! without your support."

Whether you're a fan of Bieber's classic black dress, or you prefer a little latex, the Kylie Cosmetics anniversary party appears to have been a smorgasbord of style inspiration.

Recreate Hailey Bieber's Style

Amy Mackelden
Weekend Editor

Amy Mackelden is the weekend editor at Marie Claire, where she covers celebrity and royal family news. She was the weekend editor at Harper’s BAZAAR for three years, where she covered breaking celebrity and entertainment news, royal stories, fashion, beauty, and politics. Prior to that, she spent a year as the joint weekend editor for Marie Claire, ELLE, and Harper's BAZAAR, and two years as an entertainment writer at Bustle. Her additional bylines include Cosmopolitan, People, The Independent, HelloGiggles, Biography, Shondaland, Best Products, New Statesman, Heat, and The Guardian. Her work has been syndicated by publications including Town & Country, Good Housekeeping, Esquire, Delish, Oprah Daily, Country Living, and Women's Health. Her celebrity interviews include Jennifer Aniston, Jessica Chastain, the cast of Selling Sunset, Emma Thompson, Jessica Alba, and Penn Badgley. In 2015, she delivered an academic paper at Kimposium, the world's first Kardashian conference.