The founder of celebrated South African choral group Ladysmith Black Mambazo has retired from touring. Joseph Shabalala, who formed the Grammy-winning act in 1960, will scale back his duties after more than 50 years at the helm. The 72 year old will not appear on an upcoming three-month U.S. trek, set to start on 24 January (14). The group's manager Xolani Majozi says, "Because of his age we want him to relax a bit, not to be involved in intensive tours. He can still perform, but we don't want to overwork him. We think he has done his part." Ladysmith Black Mambazo is one of South Africa's most successful recording acts and shot to international fame after appearing on Paul Simon's 1986 album Graceland. They have since won three Grammys and performed at a memorial concert in honour of civil rights icon Nelson Mandela in Cape Town last month (Dec13).