Hailey Bieber Wears Backless Dress at Met Gala 2019, Goes Solo Without Justin Just Jared Celebrity News and Gossip Entertainment 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 Hailey bieber white dress Black and White Stock Photos & Images Alamy Hailey Bieber flashes sideboob in second skin backless dress Hailey Bieber's totally backless dress plunges to her bum We Regret to Inform You: Thongs Peeking Out From Backless Dresses Are a Fall Trend Fashionista