Embedded Player Ladysmith Black Mambazo is the most famous practitioner of the a cappella singing style derived from traditional South African isicathamiya music. A quarter-century after its formation, the group gained worldwide acclaim when it collaborated with Paul Simon on his best-selling 1986 album Graceland. South Africa's most famous singing group has a new CD celebrating a decade worth of democracy in its homeland. Hear highlights from the group's performance in NPR's Studio 4A.