Rihanna’s sculptural Comme des Garçons, Beyoncé’s feathered ombré Givenchy, Kate Moss’s golden turban, Sarah Jessica Parker’s tartan Alexander McQueen, Erykah Badu’s glittering top hat, Elle Macpherson in flats! If you know your red-carpet history, you’ll know exactly what we’re talking about. Why the Met Gala, but of course. It’s when the most stunning, most avant-garde, and most take-notice clothes make their way up the stairs of the Metropolitan Museum of Art for the biggest fashion event of the year: the Costume Institute Gala. Here, we bring you our slideshow of the most unforgettable looks from the best-dressed ball of all time.