On the season finale of Mad Fashion, Chris March gets an opportunity he has only dreamed about -- a chance to design for the Met Ball. Chris creates a one-of-a-kind outfit for Sports Illustrated swimsuit model Chrissy Teigen as she makes her first trip to the fashion world's premiere event. But if the pressure of the Met Ball isn't enough, Chris also needs the approval of Chrissy's boyfriend -- Grammy winning R&B star John Legend! Can Chris get John's legendary seal of approval or will this be the look that falls flat?