The Voice is not a TV series.
Adam Levine . Since 2011 , Levine has served as a coach on NBC 's reality talent show The Voice . The Voice is an American reality television singing competition broadcast on NBC . The winners of the twelve seasons have been : Javier Colon , Jermaine Paul , Cassadee Pope , Danielle Bradbery , Tessanne Chin , Josh Kaufman , Craig Wayne Boyd , Sawyer Fredericks , Jordan Smith , Alisan Porter , Sundance Head , and Chris Blue . The Voice began airing on April 26 , 2011 , as a spring TV season program .