Shannon Noll has opened up about the moment he decided to transform his lifestyle and physical appearance.

The Australian singer, 47, told Nova 96.9’s Fitzy & Wippa with Kate Ritchie on Friday, he started hitting the gym after ‘getting fat-skinny’.

‘I’ve been back in the gym for a good eighteen months now,’ he said.

Host Ryan Fitzgerald asked: Was there a catalyst for that Shannon? Was there a moment where you went “you know what I’m not happy with the way I’m living my life and I need to change”?’

‘Yeah, I started getting fat-skinny mate, because I’m naturally skinny anyway, I’ve got skinny legs. If I don’t train and drink then you end up looking like E.T.,’ Shannon said.

Shannon Noll has opened up about the moment he decided to transform his lifestyle and physical appearance

‘You get the beer gut,’ Fitzy responded.  

Shannon agreed, adding: ‘Yeah that’s right… I couldn’t have that so I thought I have to get back in the gym again. I train really hard and try to watch what I eat when I’m training.’

It comes after Shannon and Cosima De Vito recently addressed rumours they were embroiled in a feud after their stints on Australian Idol.

The singers rose to fame on the first ever series of the talent show in 2003, making it all the way to the final three alongside Guy Sebastian, who was ultimately crowned the winner.

Cosima placed third after being forced to quit the competition due to throat nodules threatening to damage her voice, leaving the fans rooting for her devastated.

At the time, viewers speculated whether Cosima secured more votes than Shannon despite her departure for her health, prompting wild rumours of a rift between them.

The Australian singer, 47, told Nova 96.9’s Fitzy & Wippa with Kate Ritchie, he started hitting the gym after ‘getting fat-skinny’

However, more than 20 years on, the pair have firmly denied that there was ever any bad blood between them as they reunited to duet on Shannon’s new album, That’s What I’m Talking About,

Shannon admitted he felt ‘bad’ for Cosima after her ‘rough’ and sudden exit from Australian Idol, but insisted they have always been friends despite the drama.

Of the criticism Shannon received for making the final after her exit, Cosima admitted: ‘I felt really bad for Shannon, I felt really guilty.

‘We never talked about it, and we were always friends, and it was understood that we wanted the best for each other, there were never any hard feelings in any way, shape or form.’

It comes after Shannon and Cosima De Vito recently addressed rumours they were embroiled in a feud after their stints on Australian Idol