Inspired by the new trend in untraditional wedding dresses worn by rock stars on their big day, the designers must wow the judges with their own version of an unconventional wedding dress. Femme fatale, Dita Von Teese and street-style star, Chiara Ferragni serve as guest judges.

Unlike any other challenge on Project Runway, the designers need to step it up when they are challenged to create avant garde looks that will be able to stand up to the elements, especially the rain. This time, the runway will be transformed into a rainway! Star of Showtime's Master of Sex, Caitlin Fitzgerald will guest judge.