Tiësto is set to release his 4th Artist Album, 'Kaleidoscope', on 20th October 2009. The album features collaborations with Jónsi of Sigur Rós, Kele Okereke of Bloc Party, Nelly Furtado, Calvin Harris, Tegan & Sara, Emily Haines of Metric, Kianna of Tilly & The Wall, Sneaky Sound System + More. The first single to be taken from the album is 'I Will Be Here' featuring Sneaky Sound System and is out on September 16th.