Her record label Universal confirmed the 27-year-old singer's death in a statement Saturday, saying the company's staff were "deeply saddened at the sudden loss of such a gifted musician, artist and performer."
"Our prayers go out to Amy's family, friends and fans at this difficult time," the label said.
London police issued a statement Saturday saying an unnamed 27-year-old female had been pronounced dead at the scene at a home in north London.
"Enquiries continue into the circumstances of the death. At this early stage it is being treated as unexplained," said Metropolitan Police.
The size of Winehouse's appeal was reflected in the extraordinary range of people paying tribute as they heard the news, from celebrity chef Jamie Oliver, who posted "such a waste, raw talent" on Twitter to Rolling Stone Ronnie Wood, who said he was dedicating Saturday's reunion performance of his band The Faces to Winehouse. (read more)