Monday night (March 20) kicked off the Battle Rounds on The Voice, where contestants from the same team perform a duet and their coach picks the winner between the two.

Blake Shelton had a tough decision to make as he watched his Team Blake members, 15-year old Brennley Brown and Lauren Duski, go up against each other with a performance of Little Big Town’s “Better Man.”

As the judges weighed in on the performance, Gwen Stefani preferred Brennley’s performance over Lauren’s. “I would probably pick Brennley because something about your innocence—I would want to work with that,” Gwen said at the end of the peformance.

However, it wasn’t Gwen’s decision to make. Blake had the final say over the two contestants.

“I don’t want to let either one of the two of you go, but I have to,” Blake said. “All this is going to boil down to, is what I can envision moving forward with my team. This one hurts me. The winner of this battle is Lauren.”

With that, Lauren moved on to the next round. But it wasn’t over just yet. As soon as host Carson Daily reminded the coaches that Brennley was available to steal, Gwen jumped on the chance and took Brennley for her own team. Take that Blake!

Watch Brennley and Lauren battle it out over “Better Man.”