For fans of world music, South Africa's Ladysmith Black Mambazo needs no introduction.
The group has been singing a capella together for 50 years, brought together by Joseph Shabalala, a young farmhand turned factory worker from the town of Ladysmith. He had a dream of tight vocal harmonies and messages of peace.
That dream developed, and the band came to the attention of Paul Simon, who had it record "Homeless" on his album Graceland. It introduced the group to the world.