In a live finale the Nine talent show turned on musical duets between contestants and coaches Seal, Delta Goodrem, Joel Madden and Keith Urban.
The show also featured the return of Prinnie Stevens and Mahalia Barnes singing River Deep (Mountain High) -with a surprise appearance from Jimmy Barnes.
Former contestants also joined the finalists on stage for an opening number.
The Nine show has been a game-changer in Reality TV and delivered extraordinary numbers, as high as 2.8m viewers.
This post updates.