He rose to fame after debuting his phenomenal voice on Australian Idol in 2003.
And then took it to the international stage by competing in Eurovision on behalf of the nation in 2015.
Aside from his soulful voice, he is often recognised for his sensational flare for fashion.
Guess who! He rose to fame after debuting his phenomenal talent on Australian Idol in 2003, but would you recognise the little boy in this sweet childhood photo?
Over the years, he made his foray into the TV industry, proving to be a mentor to upcoming singers on multiple shows, including The Voice and X-Factor Australia.
On Tuesday, the newly turned 40-year-old shared a throwback