Winehouse has lung disease

Dr Keith Prowse, chairman of the British Lung Foundation, said Winehouse's emphysema was not curable.

"Once it's there, it's there - it is possible to have it and not be bothered by symptoms, but if you continued to smoke it would cause it to progress rapidly," he told the BBC.
"If Amy stops smoking, it's not going to interfere with her singing and she probably won't have any trouble from it."

But in the late stages of the disease, a singer would "struggle to find the breath to perform effectively", he said.

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