Carson Daly ("Last Call with Carson Daly") hosts week two of this vocal competition series, which features a colorful array of talented vocalists as they compete to prove to the coaches that they deserve to make it into their top eight. Christina Aguilera, Adam Levine, Cee Lo Green and Blake Shelton determine which vocalists advance to the battle rounds.

The "battle rounds" continue and the coaches join forces with music industry professionals for guidance. Christina Aguilera teams up with singer/songwriter Sia Furler, Adam Levine with music producer Adam Blackstone, Cee Lo Green with singer Monica, and Blake Shelton with Grammy-winning singer Reba. In this phase the coaches will pit two of their own team members against each other in a dueling duet. After the vocal face-off, each coach, with the help of their adviser, must choose which of his/her singers are the strongest and four vocalists will advance to the live shows. Carson Daly ("Last Call with Carson Daly") hosts.