Guy Sebastian has cut out sugar and carbs for his new body

He debuted his buff new body in the September issue of Men's Health.

And Guy Sebastian has opened up about his strict diet and fitness routine in the lead-up to his turn as the magazine's cover star.

The 35-year-old spoke with Fitzy & Wippa on Friday about how his wife Jules and their sons have embraced a healthier lifestyle.

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Transformation: Guy Sebastian has opened up about his strict diet and fitness routine in the lead-up to his turn as a Men's Health cover star

The Australian Idol winner, who released his new single 'High On Me' the same day, joked radio co-host Michael 'Wippa' Wipfli influenced his decision to get in shape. 

'Last time I saw you we were on Larry Emdur's boat. I was fat, we were smoking cigars, having scotch,' he recounted.

'It was that day you decided to do a little [swimming] dip, and I decided, I'm gonna end up like that if I don't do something about it!' he laughed.

Inspiration: The Australian Idol winner, who released his new single 'High On Me' the same day, joked radio co-host Michael 'Wippa' Wipfli influenced his decision to get in shape

Inspiration: The Australian Idol winner, who released his new single 'High On Me' the same day, joked radio co-host Michael 'Wippa' Wipfli influenced his decision to get in shape

Family ties: The 35-year-old spoke with Fitzy & Wippa on Friday about how his wife Jules and their sons have embraced a healthier lifestyle

Family ties: The 35-year-old spoke with Fitzy & Wippa on Friday about how his wife Jules and their sons have embraced a healthier lifestyle

Co-host Ryan 'Fitzy' Fitzgerald asked the father of two what his time frame was to transform his body.

'Between when I started and when the photos were taken, it was about eight weeks. It's been maybe 13 weeks now,' he replied.

'Mate, it was brutal. I

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