Karlie Kloss was recently spotted in a white version of Rebecca Vallance's 'Billie' gown at a red carpet event in Australia. Made from crepe, this design has strategically placed seams to accentuate your bust and waist, and turns to reveal a skin-baring open back. We love how the fluted hem elegantly trails behind you with every step. Take styling cues from the supermodel and wear it with slicked back hair and a bold red lip.