`` Free Nelson Mandela , '' by ANC raised awareness of the jailed ANC figurehead . Songwriter Gambaccini said it had a message that situation could be resolved . In 2008 , singer Amy Winehouse joined Dammers for the finale to a concert in London 's Hyde Park marking Mandela 's 90th birthday . It was performed at February 11 , 1990 concert in South Africa that increased pressure on London .
`` Free Nelson Mandela , '' by ANC raised awareness of the jailed ANC figurehead . Songwriter Gambaccini said it had a message that situation could be resolved . It was performed at February 11 , 1990 concert in South Africa that increased pressure on London .