Overview: The "battle rounds" begin and the coaches enlist the help of top recording artists to offer their knowledge and skills as advisers. Blake Shelton teams up with Rascal Flatts, Adam Levine with Joe Jonas, Jennifer Hudson with Kelly Rowland, and Miley Cyrus with her father, Billy Ray Cyrus. In this phase, the coaches pit two of their own team members against each other in a dueling duet. After the vocal face-off, each coach must choose which artist from their team is the strongest, and has the option of stealing losing artists from an opposing coach. Each coach has two steals during the battle rounds where their artists will proceed to the knockout rounds.