Karlie Kloss and Joan Smalls Wore the Ultimate Cool-Girl Halloween Costumes

What do fashion girls wear for Halloween? Well, your favorite models and industry players showed off the best costumes at the Metropolitan Museum of Art last night. The famed New York City museum hosted its first All Hallows' Eve benefit, and it drew an exceptionally stylish crowd: Karlie Kloss, Joan Smalls, Jessica Chastain, Eva Chen, and more.

If you're looking for a sultry costume idea, Kloss has you covered: She wore a sheer dress, leather gloves, Fleur du Mal's Disco Lace Cat Mask and Choker, and Commando's Classic Control Briefs ($48). Her supermodel BFF, on the other hand, went for a cute approach with her Minnie Mouse costume with Tamara Mellon heels. Which vibe will you be going for on October 31?

Scroll down to see the costumes everyone wore to the Metropolitan Museum of Art's benefit.

Karlie Kloss and Joan Smalls
Jessica Chastain and Lauren Santo Domingo
Eva Chen and Jennifer Meyer