Article continues below advertisementHailey Bieber scorched in a see-through gown.The model, 28, exposed her butt in a backless, sheer black dress at the 2025 GQ Men of the Year party on Thursday, November 13.Bieber was the guest of honor, as she served as the cover star for the magazine's special issue.Article continues below advertisementSource: @goodmorningamerica/InstagramHailey Bieber flashed her butt on the red carpet.She sported a floor-length halter design that plunged all the way down to her butt.