Join Seal, Delta Goodrem, Kelly Rowland and Boy George on their quest to unearth Australia's next star. Who has what it takes to turn heads and chairs in the toughest season yet in front of one of the biggest coaching line-ups in Voice history?

The Voice switches into the brand new Knockout phase of the series. Tonight teenage wonder Lucy Sugerman goes up against Brooke Schubert and powerhouse Liz Conde in a breathtaking Sia contest. Plus crowd favourite Judah Kelly returns.