Ladysmith Black Mambazo are obviously seasoned entertainers. The harmony and singing was incredible, with a few of the older performers struggling to catch their breath, which is fair enough.
What I love about them is that their purity, no fancy instruments or background singers, they just get up on stage and sing their hearts out. My only criticism is they should have better microphones so when they are dancing / moving away from the upright microphones, the sound is not interrupted.