As soon as Bella Hadid arrived on the red carpet at Cannes [1] in this sexy Alexandre Vauthier number, we thought, "there ain't no way she's wearing underwear." How could she be, what with that thigh-high slit and serious side boobage? But we were wrong — so wrong. When Bella's stylist, Elizabeth Sulcer, spoke to Vanity Fair [2] about the memorable style moment [3], she revealed a secret: the gown came complete with a built-in silk bodysuit.

Elizabeth also admitted it took a lot of poise to flaunt such a look. "Bella is smart and confident, and we knew she could wear that dress," she said. Read on for an all-angles view at the Cannes ensemble that caused serious chatter and admire Bella's serious model prowess as she climbed the steps with ease.