Plot: THE BATTLES CONTINUE - THE COACHES ENLIST FELLOW MUSICIANS STEVIE NICKS, LITTLE BIG TOWN, ALICIA KEYS AND GAVIN ROSSDALE TO PREPARE THEIR ARTISTS FOR BATTLE - The "battle rounds" begin and the coaches enlist the help of the music industry's top recording artists to offer their knowledge and skills as advisers. Adam Levine teams up with Stevie Nicks, Blake Shelton with Little Big Town, Pharrell Williams with Alicia Keys and Gwen Stefani with husband Gavin Rossdale