Oh Will, you lucky thing!
They used one of their songs for a Heinz baked bean advert a while ago.
Joseph Shabalala's voice brings tears to my eyes!

I've just looked up some stuff on Google, and the word 'Mambazo' means 'axe' in Zulu.

And the poor guy's full name is:-

Bhekizizwe Joseph Siphatimandla Mxoveni Mshengu Bigboy (!) Shabalala

In Phonetics at Uni we learned how to speak in clicks, which is harder than it sounds. Part of our oral exam involved producing San, Zulu and Basarwa words containing all types of clicks. I was the only one who could do it. But then, talking is my forte!! :)