HARDtalk's Stephen Sackur speaks to South African musician and campaigner Yvonne Chaka Chaka. She was raised in poverty in Soweto under apartheid; her ability to sing gave her a route out. Her songs, celebrating the pride and strength of black South Africa, became favourites of Nelson Mandela. After thirty years of recording and touring she's known as the 'princess of Africa'. How does she feel about the changes she's seen? Show less