Celebrities , statesmen gather in London to celebrate Mandela 's 90th birthday . Score: Our work is for freedom for all . '' 6 Crowd of 46,664 sing `` Happy Birthday '' led by Will Smith . Performers include Amy Winehouse , Queen , Annie Lennox , Simple Minds .
Celebrities , statesmen gather in London to celebrate Mandela 's 90th birthday . Score: 6 Crowd of 46,664 sing `` Happy Birthday '' led by Will Smith . Performers include Amy Winehouse , Queen , Annie Lennox , Simple Minds .