Can anyone tell me who the group is?

Question

All I can tell you is that there are 8 black men and one black woman. They are dressed in smocks from the early seventies. We have eliminated Earth Wind and Fire, Smokey Robinson and the Miracles, the Commodores, Kool and the Gang...etc. Any ideas appreciated!!

Answer 1

african black mumbassa??

Answer 2

The Harlem Globe Trotters with their mother comes to mind

sorry dont know

Answer 3

african black mumbassa??

That's "Ladysmith Black Mambaso"