Never mistake Rosie Assoulin’s girl for basic. She’s not showing up to the party in an LBD but, rather, a glamorous salmon sculptural strapless top with tailored cigarette pants, or a moody floor-length crimson skirt with cascading train and just-threw-it-on white shirt. And if she’s really pulling out the stops: a silver jumpsuit featuring Assoulin’s signature exaggerated wide legs, or one of the gowns with dramatic mermaid skirt, is all anyone will talk about.