Thank you all for your comments and links to news articles and youtube videos. Miriam Makebo used her beautiful voice to serve her ideals, first for the anti-apartheid cause and later, for other causes. She never swerved from her dedication. Two of my favorite videos of her singing are from her concert with Paul Simon in Africa on his Graceland tour singing Under African Skies and the South African National anthem.
My only problem with all this is that I can't stop listening to her. I've gotten very little sleep for the last two nights.
Miriam, your lifelong use of your musical talent to righting the wrongs in the world is an inspiration to all of us. RIP.