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London (CNN) -- Singer Amy Winehouse was found dead at her apartment in London Saturday, the UK Press Association reported. She was 27.

London police said they were called to a home, which matches Winehouse's address, Saturday afternoon in response to "a woman found deceased."

"On arrival officers found the body of a 27-year-old female who was pronounced dead at the scene," a police statement said.

"At this early stage it is being treated as unexplained," police said.

The "Rehab" singer had a history of battling drugs and alcohol and recently left a British rehabilitation program that a representative said was intended to prepare her for scheduled European concerts.

But she cut short the European concert tour in Belgrade, Serbia, last month after she staggered around the stage and stumbled through several songs.

Audience members booed Winehouse off the stage that night just a few songs into the first concert of the tour.

Winehouse rep Tracey Miller told CNN at the time that the singer "agreed with management that she cannot perform to the best of her ability and will return home."

"Everyone involved wishes to do everything they can to help her return to her best and she will be given as long as it takes for this to happen," representative Chris Goodman said in a statement in May.

Winehouse's throaty vocals brought the British musician stardom in 2007, but her off-stage life gained her notoriety. The lyrics of her songs, especially the hit "Rehab," chronicled her troubled life.

The song, in which she sang "They tried to make me go to rehab, I said no, no, no," helped form the public's view of Winehouse.

"I don't care enough about what people think of me to conform to anything," she said in a CNN interview.

Winehouse, born in London in 1983, became a picture of a tattooed teenage rebel after she was expelled from a prestigious performing arts school.

Her first album, "Frank," debuted in 2003, when the singer-songwriter was 19.

International success came with her 2007 album "Back To Black," which in included the single "Rehab."

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