Hailey Bieber & Justin Bieber Wear Contrasting Outfits.

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

[{"selector":"#anim-051e63ed-a7f2-41dc-9867-30da075a22c4 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-31.246337776828504%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-01e849de-202e-49ea-af5b-27d50f477d07 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(2.937499710979218%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Hailey Bieber's Cutout Blazer Dress Was Insane.

[{"selector":"#anim-99317397-3b63-4a59-a16d-e7b21b017e59 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-7.812499744007886%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-1c71ef36-3809-44de-942d-a4a66fb1156a [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(21.874999829338595%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-2e98e438-41b4-4ae5-94e6-adbd0a0df816 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-7.796013811903159%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-54518fa5-0cee-44f8-86e1-d7d9c328dc42 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(10.288037177101124%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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!.

[{"selector":"#anim-60502ee9-793c-4067-86c2-1fb66bd89fc3 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-21.874999829338588%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Find our more stories

[{"selector":"#anim-5b4f4ff5-7d07-4a25-b429-7bd1ea9f8bbd [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(11.579508838370757%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] Kangana Ranaut sue Filmfare magazine.