While on her european tour, Whitney performed at the Nelson Mandela Tribute Concert, on June 11, 1988, in London. Organized by Artists Against Apartheid, a british awareness-raising pressure group, the concert was something of a "Live Aid 2". The world's pop stars came together for one spectacular 11-hour gig to remind the public of the long imprisonment of Nelson Mandela in South Africa. Whitney was joined by Phil Collins, Al Green, Stevie Wonder, Peter Gabriel, George Michael and dozens of other celebrities, and the show was transmitted live by BBC.