Jordan Crowson

For the first challenge, Rihanna tasks the designers with creating designs inspired by their favorite music artists. While some designers thrive with the creative freedom, others struggle to keep up with their first celebrity design challenge. The mentors are Pharrell Williams, Erin Wasson and Mel Ottenberg.

The designers create "off-duty" rock star looks for singer Carly Rae Jepsen; the winning look will be in a Glamour.com feature.

The final three designers create a look inspired by Rihanna's latest fragrance; the designers go head-to-head in an epic fashion show.

The remaining four designers must create complementary looks for power couple Naya Rivera and Big Sean for his record release party.

The cast creates looks inspired by old Hollywood glamour for Khloé Kardashian to wear at a Grammy Awards after-party. Recording artist Ne-Yo is guest mentor.

The six remaining designers create complementary stage looks for The Band Perry.