It's almost surprising what small numbers of people have actually heard of this amazing musician.
Although he only lived until 38, he was a big promoter of peaceful revolution, and the independence of Hawaii; he could be classified as one of the greatest musicians of the 20th century.
Most famous for his medley of Over the rainbow/What a Wonderful World, he truly personifies peaceful Hawaiian music. His appearance may seem somewhat strange when you listen to his voice, but it all adds to his character. He is one of the few who has transitioned from simply an artist to a symbol, much in the similar style as Bob Marley.
Anyway, if you have heard of him, what do you think of him; and if you haven't I suggest you give some of his material a listen.