He's known as the lovable entertainer who stole our hearts way-back-when on the very first season of Australian Idol.
After taking the title of Australian Idol in 2003, just beating out Shannon Noll, Sebastian's career has done nothing but sky-rocket. With several hit songs and top-selling albums, as well as a regular stint on the judging panel of Australian X-Factor, Sebastian has dominated the Australian music scene for well over a decade.
Well, if you remember the Aussie crooner as looking like this, you're in for a BIG surprise.
The star has since gone through a major body transformation and has taken to his Instagram account today to share a very steamy selfie.
"After travelling home from touring UK and finishing the album etc I haven’t had much time to work out at all," he wrote. "It only took a few days of not exercising for me to start freaking out like it’s all going to be lost! I guess I just don’t want to go back to my old, injured Dad bod and it stresses me out. Anyway I just exercised for the first time in a week and I’m happy to say I will be back on track after a few workouts! Enjoy your Monday and stress less!"
This article previously appeared on New Idea.