Olsen's low ponytail was simple and low-key, and that's exactly what made it so chic and unexpected. Plus, she decorated it with one of the season's hottest accessories—a piece of black ribbon. "When Ashley Olsen says, 'I'm thinking about a ribbon or bow for the Met Ball,' I come prepared," hairstylist Mark Townsend posted on his Instagram account
. By the looks of it, I'm pretty sure he cleaned out an entire Michael's craft store.