On the  American reality competition Under the Gunn, singer Zendaya appear as a guest judge with what other single name singer?
Under the Gunn: Under the Gunn (also known as "Project Runway: Under the Gunn") is an American reality competition series that premiered January 16, 2014, on Lifetime. Under the Gunn:  The series was filmed at the Fashion Institute of Design and Merchandising in Los Angeles. Under the Gunn:  Guest judges included: Heidi Klum, Neil Patrick Harris, Macklemore, Jaimie Alexander, Zoey Deutch, Zendaya, Georgina Chapman, Sarah Hyland, Trina Turk, and Wendy Partridge. Zendaya: Zendaya's music career began in 2011 when she released the single "Swag It Out", followed by the single "Watch Me" (with Bella Thorne); the former was released by an independent record label.
Macklemore