Amy Winehouse could be forced to pull out of Glastonbury because of her current mystery ailment her spokesman has admitted.

The singer is set to play the festival next weekend, the day after she is due to perform at the Hyde Park concert celebrating Nelson Mandela’s 90th birthday.

Winehouse is still undergoing tests at a London clinic after fainting at her home while doing ‘admin’ earlier this week.

Doctors have already ruled out any possibility of the illness being TB.

Her spokesman said: "Amy has undergone more scans and tests and we are awaiting the verdict of her doctors.

"At present, she still intends to perform at the two scheduled dates next week. However, a decision will be made entirely upon the advice of her doctors and in her best interests."

(by Daniel Melia)