Yes, Te Kanawa is Maori. A beautiful soprano indeed.
For whatever it's worth, I don't think there is anything in any sport worldwide, cheers, chants, psyche-ups whatever, quite a stirring as a tradional Haka. Even when it's done at a 'social' event, it's really wonderful to watch it being done properly. Maybe it's the purism or tradition of it that just gets me. Much in the same way as watching a Zulu warrior dance does. My heart just pounds!
And when it's the All Blacks doing it before a rugby game, then you just KNOW you're going to watch a brilliant match. On international rugby, IF SA is not playing, then I support the All Blacks. In the 5 Nations, I support Scotland (because their national anthem is so rousing and I'm 1/2 Scots) and 2nd, France (also because of their anthem and that's the other 1/2 of me).