The battle rounds continue on 'The Voice.' Country girl Gwen Sebastian, who made Blake Shelton's team with Sugarland's 'Stay' during the audition round, will take on Pat Benatar's 'We Belong.' She battles fellow 'Team Blake' member Erin Willett. It's hard to tell from the promo who will win the round. It looks like Erin has the edge but she does most of the singing in the one minute video tease.