Critically acclaimed R&B singer Amy Winehouse was reportedly found dead in her London apartment today at 4 p.m. local time. She was 27 years old. According to the Daily Mail, her death is "believed to be unexplained." Winehouse appeared at a concert on Wednesday featuring her 15-year-old Goddaughter Dionne Bromfield, and according to one source, "staggered onstage" to tell the audience to buy Bromfield's new record.

Winehouse cancelled 11 dates of a European tour after a disappointing performance in Belgrade, Serbia, last month, and later refused payment for the concert. Before embarking on the tour, according to Entertainment Weekly the singer spent two weeks at a clinic in London for unspecified reasons.

Winehouse is best known for her 2006 sophomore album Back To Black, which made her the first woman from the UK to win five Grammys, including Record of the Year, and tied the record held for most Grammys won on a single night by a female artist. Her struggles with drugs and alcohol that she shared with her former husband Blake Fielder-Civil are well-documented. Winehouse joins a host of musicians such as Brian Jones, Jimi Hendrix, Janis Joplin, Jim Morrison and Kurt Cobain who all died tragic deaths at the age of 27.