Amy Winehouse‘s father has spoken of his fears that the singer risks losing her award-winning voice and her life unless she kicks her drug habit.

In an interview with the Sunday Mirror, Mitch Winehouse said his daughter – who was rushed to hospital after collapsing last week – has developed the chronic lung disease emphysema, possibly brought on by smoking crack cocaine.

The extent of her health concerns were outlined by Mr Winehouse in the interview. He told the paper doctors said if the singer continued in the way she was going, she would have ended up an invalid.

He said: “She’s got emphysema. It’s in its early stages, but had it gone on for another month they painted a very vivid picture of her sitting there with a mask on her face struggling to breathe.”

Mr Winehouse added that smoking crack and cigarettes had meant that her lungs were ‘all gunked up’, saying: “The doctors have told her if she goes back to smoking drugs it won’t just ruin her voice, it will kill her.”

The concerned father said his daughter had vowed to stay clean and has started a drug replacement programme.

But he said: “I’m saying to those drug dealers, and they know who they are, if they are supplying crack to Amy, then they’ve got to take responsibility.

“I don’t want her hanging out with her mates like Pete Doherty either. What hope does she have if people are taking drugs around her?”

It’s unclear whether Amy will be healthy enough to perform her headline slots at the Nelson Mandela concert in London’s Hyde Park on Friday and at Glastonbury on Saturday.

Glastonbury will be covered live on BBC Two and Three from this Friday until Sunday.