Hailey Bieber's Backless Cut Out Dress Is Impossible to Ignore Mandatory Hailey Bieber flashes sideboob in second skin backless dress The Most Spine Tingling Hailey Bieber Backless Dress Moments Hailey Bieber proves backless dresses are the ultimate spring summer statement (aff) the tutorial everyone's been searching for Hailey Bieber at the MET Gala, the ultimate smooth slickback recreated by @beatriceravizza #thesmoothcompany #haileybieber #slickback #viralhairstyle #metgala Hailey Bieber kept it sleek and flirty in a soft pink Alexander Wang gown, turning heads with an open back, crystal thong detailing, and a high ponytail topped with a black velvet