Question: The lead singer for the pop rock band Maroon 5 was a returning coach on the fourth season of an American reality talent show that premied on what date?
Sentence (from "The Voice (U.S. season 4)"): Coaches Adam Levine, CeeLo Green, Christina Aguilera, and Blake Shelton returned, though Green and Aguilera appeared as performers instead of coaches.
Relevant evidence: Yes