A documentary about Paul Simon's trip back to South Africa, where he recorded hit album Graceland, has won the Audience Award at the South By Southwest festival in Texas.

Under African Skies is director Joe Berlinger's film chronicling the 25th anniversary trip.

When the You Can Call Me Al singer recorded the 1986 album with vocal group Ladysmith Black Mambazo and other local musicians, he stirred up controversy because Apartheid was in place in South Africa - and the singer/songwriter ignored an international cultural boycott on the nation to work on Graceland.