From thousands of hopefuls, we're now down to the final 21. This week's all about transformation & the judges will be scrutinizing each singer's ability to elevate their performance to the next level.

With a special appearance from Tate McRae, it's the last of the Top 21 performances. Only 12 Idol hopefuls will continue to the next round and keep their dream alive, to be the next Australian Idol.