A story about Hawaiian singer Israel Kamakawiwo'ole (Iz) and his beloved medley of "Over the Rainbow" and "What a Wonderful World" The day Iz was born, on a beautiful Hawaiian island, the world sang him a lullaby. What a good song. But what is the good song? Iz spent his short life listening for it and found it in his heart one stormy night. And the good song rose up and over the rainbow and out to the world to the hearts of listeners everywhere.