The Metropolitan Museum of Art's annual Costume Institute exhibition is the most spectacular event of its kind. With subjects that both reflect the zeitgeist and contribute to its creation, each exhibi-tion--from 2005's Chanel , to 2011's Alexander McQueen: Savage Beauty and 2013's Punk --creates a provocative and engaging narrative attracting hundreds of thousands of visitors. The show's opening-night gala, produced in collaboration with Vogue magazine...