Costume Change! See How Stars Let Loose After the Met Gala

The Met Gala took over New York's Metropolitan Museum of Art on Monday, and what a night it was! From Lady Gaga's showstopping arrival to the Kardashian-Jenner family's sexy appearances, it was truly one for the books! But the night didn't end there! Following the glamorous dinner, stars switched up their looks and popped up at a handful of afterparties. Kim Kardashian slipped into a skintight blue dress and beaded wig to hit up the official afterparty with Kanye West, where they linked up with her little sister Kendall Jenner and a whole host of models. Meanwhile, the Boom Boom afterparty at the Standard Hotel brought out a handful of celebrities like Ashley Graham, Celine Dion, and Nick Jonas and Priyanka Chopra. Ahead, see the best pictures from this year's hottest Met Gala afterparties!