The cast creates "off-duty" rock star looks for singer Carly Rae Jepsen and learns that the winning look will appear in a Glamour.com feature. But before they can begin designing, they must get their ideas approved by Carly Rae's stylist as well as Glamour's fashion news editor. It's a test to see who can handle multiple voices and points of view, and who cannot.

The eight remaining designers must create stage looks for Australian twin sisters Liv and Mim, commonly known as the DJ duo NERVO. The pieces all must incorporate cutting-edge technology like LED lights and fiber optics; however, the real challenge comes when the designers must pair up into teams. Which twosome will learn how to work well together and which will implode? Recording artist Kid Cudi serves as the guest mentor.

The six remaining designers create complementary stage looks for country rock crossover group, The Band Perry, for an upcoming Nashville show. Making menswear for brothers Neil and Reid Perry throws some of the designers into a panic and tests who can adapt to an unfamiliar task.