The singer posed up a storm on Instagram recently and fans couldn't believe the difference in his transformation!
He first shot to fame in 2011 after auditioning for Australia's Got Talent with Whitney Houston's 'I Have Nothing'.
Less than three months after his audition, Jack won the series, releasing an album which debuted at number three on the ARIA charts.
Jack has now become somewhat of an Instagram sensation, boasting over 14,000 followers.
This article originally appeared on New Idea.
