Robbie: My life is about cake!
Robbie Williams has said he has to release albums to keep the weight off.
When he is not on tour, the pop star said he balloons as he sits at home watching reality TV and eating sugary foods.
Now the 40-year-old has swapped meals for protein shakes to keep his weight down, the Daily Mirror reported.
According to the newspaper, he told Aussie radio station Mix 94.5: "My secret is not eating. Christmas was just a vast array of chocolate and cake and sugar and carbohydrates.
"I knew I was doing promo in Australia and I did a rather unhealthy thing of not eating.
"My regime so far is to have a big breakfast and then two protein shakes for the rest of the day."
He joked: "My life used to be about sex, drugs and rock and now and it's now about cake!
"When I'm not on tour I'm at home eating crisps and cake and watch reality TV and if I do it for too long without doing an album I end up wearing an elasticated waist band or a kaftan as I go really fat and I grow a beard and look like a killer, so I have to release an album to stop me being morbidly obese."