Question: Season 6 of The Voice included the coach who debuted in 2001 with what song?
Sentence (from "The Voice (U.S. season 6)"): Adam Levine and Blake Shelton returned as coaches for their sixth season, while Shakira and Usher returned for their second season after being replaced by original coaches Christina Aguilera and CeeLo Green in season five.
Relevant evidence: Yes