is headed to the live shows, and it's time for season 20's first fan vote: the 4-Way Knockout!One singer from each team, saved by their coach during the Battle Rounds earlier this season, took the stage on Monday's show to perform a new song, in the hopes of earning the most votes and moving on to next week's live shows.For the first time this season, the power is out of the hands of coaches Blake Shelton, Kelly Clarkson, John Legend and Nick Jonas.