The Battle Round began Monday on NBC's The Voice season 18. Coaches Kelly Clarkson, Blake Shelton, Nick Jonas and John Legend were joined by celebrity advisers Dua Lipa, Bebe Rexha, Kevin and Joe Jonas and Ella Mai, respectively. This season implemented a new rule for the round. Saves can only be used in the event of there not being a bid for a steal, and the saves will also have to all compete in a four-way knockout at the end of the round.