Question: On the  American reality competition Under the Gunn, singer Zendaya appear as a guest judge with what other single name singer?
Sentence (from "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.
Relevant evidence: Yes