For The Voice Season 27, the battle round is officially in the rearview mirror. Packed with shocks and surprises aplenty, each of the four coaches, Kelsea Ballerini, Adam Levine, Michael Bublé, and John Legend, were intent on delivering showstopping vocal duets and, in doing so, have fashioned a set of knockout rounds that instantly looked impossible to call. In the most recent episode, this was proven true, with a selection of stunning performances leaving coaches with yet more nail-biting decisions.