Every year, we wait with baited breath to see all of the spectacular looks we've grown to expect from the prestigious Metropolitan Museum of Arts Costume Institute Gala red carpet. From Sarah Jessica Parker's tartan Alexander McQueen dress in 2006 to Kate Moss' Marc Jacobs turban look in 2009, the Met Gala has produced some of the industry's most memorable looks of all time. While it is clearly a chance for the fashion set to show off their sartorial chops, it is also a chance for our favorite designers to step out, arm-in-arm, with the muses that inspired them that evening. In anticipation of this year's Gala, click through for the best designer date night duos from Met Galas past. Think of it as prom night for the fashion set.