Hailey Bieber & Justin Bieber Wear Contrasting Outfits.

Hailey wore a head-to-toe noir ensemble styled by Karla Welch.

Justin opted for more casual attire with a contrasting color palette, including a light gray hoodie from his streetwear brand Drew House.

Hailey Bieber's Cutout Blazer Dress Was Insane.

To make her look even more effortlessly stylish, Bieber tied her dirty blonde tresses into a slicked-back.

Bieber attended the soiree with her husband Justin, 28, in support of Jenner, 26, her longtime pal and fellow model.

At the party, Justin wore a more casual look, including a grey graphic sweatshirt, light wash jeans.

From smiling snaps of the Biebers and Jenners to up-close shots of the luxurious drinks to the epic style moments of the night, it looked like one to remember!. 

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