Dutch DJ Tiësto's fourth studio album Kaleidoscope comes with a variety of collaborative vocal guests spots including Jónsi of Sigur Rós, Kele of Bloc Party, Nelly Furtado, Calvin Harris, Emily Haines, and Tegan & Sara. He explains the logjam: The starting point was to work with different artists that I liked. It was as simple as that. Sigur Rós make ...