The battle rounds conclude unlike ever before as the night begins with Alicia sitting down at the piano to help her artists, leaving the two of them and DJ Khaled equally in awe of Alicia herself on "the keys." Adam and John Legend help an unlikely p... (more)airing find common ground and put on a performance that wows the coaches. Celine Dion stuns Team Gwen's final battle pair when she personally choreographs their performance. Adam, the only coach left with a steal, finds the artist he's been waiting for.