Amy's mystery illness baffles doctors

Troubled AMY WINEHOUSE has tested negative for deadly disease tuberculosis - but doctors say the star's mystery illness has left them baffled.

The Back To Black hitmaker was admitted into a private clinic in Marylebone, London on Monday after she collapsed in her home in the British capital.

But medics say they are unsure what cased the singer to pass out, and think she may be suffering from a chest infection.

It had been reported the star may have contracted the infectious condition, which is said to be common among drug addicts and heavy drinkers, as they have a reduced immunity and are more vulnerable to infection.

But a representative for the star has confirmed she has been given the all-clear after a series of medical tests.

Chris Goodman said: "She has a chest infection and she had a routine test for TB, which came back negative."

The 24-year-old is still undergoing treatment and doctors will soon decide whether she is fit to honour her upcoming performance commitments - including an appearance at legendary British music festival Glastonbury at the end of the month.

Goodman added: "She would really love to do the show - she always wants to do these things. But she will listen to her doctors."