Camila Cabello, John Legend, Gwen Stefani and Blake Shelton chat with ET's Cassie DiLaura about season 22 of 'The Voice.' Blake, who's competed in every season of the series, lovingly mocks the 'Bam Bam' singer's history with 'The X-Factor.' Gwen returns for the first time since season 19 and she's quick to point out her contestant, Carter Rubin, was crowned the winner! Season 22 of 'The Voice' premieres Sept. 19 on NBC.