Troubled singer Amy Winehouse has confirmed she will perform at a concert in celebration of Nelson Mandela's 90th birthday.

The 46664 concert will take place at London's Hyde Park on June 27.

The name of the concert - 466664 - is taken from Mandela's actual prison number which was imposed on him by authorities for 35 years.

Mandela was imprisoned on Robben Island in 1964 and was the 466th prisoner to arrive that year.

"Prisoner 46664" continues to be used, as a reverential title for him, and the Nelson Mandela Foundation uses 46664.com as its website address.

Winehouse and her band will join top artists including Queen and Paul Rodgers, Annie Lennox, Simple Minds, Leona Lewis, Sugababes, Razorlight as well as a dozen South African artists including Johnny Clegg, Papa Wemba and the Soweto Gospel Choir.

Will Smith, Oprah Winfrey, Robert De Niro, Forest Whitaker and Lewis Hamilton will also be there.

Concert organisers said Winehouse was "honoured" to add her voice to those who continue to support Mr Mandela and the 46664 organisation, which raises awareness about the impact of Aids and promotes HIV prevention.

Tim Massey, international director of 46664, said: "We are delighted that Amy will be appearing at Hyde Park to celebrate Nelson Mandela's 90th birthday.

"Amy joins an illustrious list of names showing their support for 46664 and the fight against Aids."

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