Amy Winehouse performs at the Glastonbury music festival, in Pilton, Somerset, in south-west England.—AFP

LONDON: Troubled British singer Amy Winehouse has been found dead at her flat in north London, police said. She was 27 years old.

The Grammy award-winning soul singer struggled with well-documented drink and drug addictions. Her death is being treated as unexplained.

“Police were called by London Ambulance Service to an address in Camden Square shortly before 4:05 pm (1505 GMT) today, Saturday 23 July, following reports of a woman found deceased,” a police statement said.

“On arrival officers found the body of a 27-year-old female who was pronounced dead at the scene.

“Enquiries continue into the circumstances of the death. At this early stage it is being treated as unexplained.”

London Ambulance Service had been called to the flat at 3:54 pm (1454 GMT) and sent two ambulances.

Winehouse rocketed to fame after winning five Grammy awards off the back of her 2006 second album “Back to Black” and the hit single “Rehab”.

In the run-up to her live return, Winehouse spent a week at an addiction treatment clinic in London, reportedly at the suggestion of her father, Mitch, over concerns that she was drinking too much before her shows.

But Winehouse pulled out of her European comeback tour following a disastrous opening performance in Serbia on June 18.

She was booed at the performance in Belgrade, as she appeared to be too drunk to sing.

Some 20,000 people gathered for the highly-promoted concert at the sixth-century Kalemegdan fortress, but many soon left.

During the concert, which lasted about 90 minutes, Winehouse could only mumble some of the lyrics, failing to follow her band.

Winehouse left the stage twice, with many fans showing their displeasure despite her band's attempts to calm the crowd.

She had also been scheduled to perform in Istanbul, Athens, Bilbao in Spain, Locarno in Switzerland, Italy's Lucca festival, Switzerland's Paleo Festival in Nyon, Nova Jazz and Blues Night in Wiesen, Austria, and Poland's Bydgoszcz Artpop Festival.