While Gigi Hadid rocks the runway [1] at New York Fashion Week, her sister Bella's holding down the fort on the red carpet [2] in LA. The model joined her beau, The Weeknd, at the Grammys [3] in one of the sexiest looks she's worn yet: an Alexandre Vauthier Haute Couture number with a plunging neckline, cutouts, and a leggy slit. It's safe to say Bella left everyone breathless as she struck a fierce pose, showing off her strappy leather heels and a handful of eye-catching Bulgari accessories: a Serpenti cuff, Corona diamond studs, and an edgy box clutch.

Read on to see her crystal-covered date-night outfit — along with The Weeknd's custom Givenchy suit — from all angles. Then, check out the next sexy black dress [4] Bella wore to the afterparty!