NBC The top eight singers took the stage on Monday's live semifinals performance episode of NBCs The Voice. Not only were they singing for Americas votes, but the coaches were also voting for their favorites. Tuesdays results will take both of those into account. During the show, Blake Shelton performed his newest single, "Over," for the first time on television. Also, Adam Levine and Cee Lo Greens teams came together to sing The Killers All These...