Actress and singer Zendaya joins Project Runway: Threads as a guest judge and is blown away by what young Matt, Brianna and Claire bring to the world of fashion. The designers are ecstatic to create looks suitable for their favorite pop stars, Katy Perry, Lady Gaga and Florence Welch. But, when an unconventional twist and an extra look comes their way who rises to the top and who sinks? And, how do their adult assistants handle the pressure? Vanessa Simmons hosts. She is joined by judges Christian Siriano and YouTube sensation Ingrid Nilsen.