British pop singer Amy Winehouse
Amy Winehouse was found dead on July 23, 2011. Reuters

Troubled, Grammy-winning singer Amy Winehouse was found dead in her North London home on July 23.

In a statement, the London Metropolitan Police said, Police were called by London Ambulance Service to an address in Camden Square NW1 shortly before 16.05hrs today, Saturday 23 July, following reports of a woman found deceased. 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.

Winehouse made a surprise return to London audiences on July 20, just one month after the singer cancelled her entire European tour after her performance at Kalemegdan Park in Belgrade.

During that show in Belgrade, she was booed repeatedly for delivering disjointed versions of Valerie, Back To Black and Love Is A Losing Game.?The singer also spent much of the gig mumbling the words to her songs and stumbling around the stage, which she often left altogether.

To everyone's surprise, she appeared on July 20 at the iTunes Festival 2011 in London.

Here's a look at her haunting final performance:

Amy Winehouse London ITunes Amy Winehouse