Also, not all world music is slow. Some New Age-ish stuff like enya is, but other stuff is real fast, too.
Akon is West African, but he sings popular music (aka pop) in America, so I don't think he counts. But he does have a good singing voice...
There is a lot of Japanese music, which kind do you listen to? They have their own version of rock and popular music, all of which is pretty unique, I think...