It’s no trifle matter that the annual Met Gala is hosted by the Costume Institute at the Metropolitan Museum of Art. Each year’s theme, tied to the content of that year’s Costume Institute exhibit, is pretext to don outlandish garb like 18th-century-inspired Dangerous Liaisons ball gowns, primary colored Superhero homages, or simply the grandest haute couture that would stick out on the Oscars red carpet like a sore thumb. This year’s “Punk: Chaos to Couture” exhibit was an open invitation to guests’ finest tulle, bustiers, and other edgy-chic items. From Rooney Mara’s ethereal frock to Nicole Richie’s decidedly more committed look, here are the highlights of this year’s Met Gala.