"Fast Car" was a worldwide success after Tracy Chapman's unexpected performance in Nelson Mandela's 70th Birthday Tribute (Wembley Stadium, 1988). She had already played her normal set, but when Stevie Wonder had a technical problem with the equipment, the organizers called her at the last minute to fill the time. She returned to the stage with only guitar and sang "Fast Car" to millions of live viewers, which was the moment that launched her international career.