Calvin Harris is terrified he is going to get swine flu.
The 'I'm Not Alone' star says fame has taken a toll on his health and he is convinced he will fall victim to the potentially-fatal virus even though he hasn't been exposed to it.
He said: "I've got a weak immune system. In fact I'll probably get swine flu.
"I've been off alcohol for eight months now and feel better for it. I'm more pro-active. People know not to offer me drinks now. Nothing sparked it except too many big nights."
The dance star – who topped the UK charts with Dizzee Rascal on 'Dance Wiv Me' last year – had a low-key celebration when his latest hit 'I'm Not Alone' reached number one in the UK singles chart last month because of his new-found sobriety.
He explained to Britain's Daily Star newspaper: "Of course it mattered having a number one without Dizzee. It's better people know and like me than think I'm an idiot.
"I was in the studio at the time I found out and had a ham sandwich on my lap so it seemed a good time to eat it."