Kaleidoscope is the fourth studio album by Dutch DJ and record producer Tiësto, released on 6 October 2009 by Musical Freedom, Tiësto's new label in association with PIAS Recordings. The album contains collaborations with Nelly Furtado, Emily Haines of Metric, Tegan and Sara, Jónsi of Sigur Rós, Kele Okereke of Bloc Party, and Calvin Harris among others.

Tijs Michiel Verwest OON, known professionally as Tiësto, is a Dutch DJ and music producer. He was voted "The Greatest DJ of All Time" by Mix magazine in a 2010/2011 poll amongst fans. In 2013, he was voted by DJ Mag readers as the "best DJ of the last 20 years". He is also regarded as the "Godfather of EDM" by many sources.