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

The album also features the song "I Will Be Here" with Australian dance act Sneaky Sound System, which was released as the lead single on July 28, 2009. The album entered the Dutch album charts at number 2. It also debuted at number 20 on the UK album charts and at number 5 on the lrish and Mexican album charts.

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Tracklist:

1. Tiesto Feat Sneaky Sound System - I Will Be Here (Tiesto Remix
2. Tiesto Feat Kele Okereke - It's Not The Things You Say (Ali Wilson Remix
3. Tiesto Feat Nelly Furtado - Who Wants To Be Alone (Pillip D Remix
4. Tiesto - Louder Than Boom (Bart B More Remix
5. Tiesto Feat C.C. Sheffield - Escape Me (Avicii Remix
6. Tiesto Feat Emily Haines - Knock You Out (Mysto & Pizzi Remix
7. Tiesto Feat Tegan & Sara - Feel It In My Bones (First State Remix
8. Tiesto Feat Jnsi - Kaleidoscope (Ferry Corsten Remix
9. Tiesto Feat Cary Brothers - Here On Earth (Nic Chagali Remix
10.Tiesto - Surrounded By Light (Extended Tiesto Remix
11.Tiesto - Always Near (Extended Tiesto Remix
12.Tiesto Feat Priscilla Ahn - I Am Strong (Jonas Stenberg Remix
13.Tiesto Feat Calvin Harris - Century (Ned Shepard & Sultan Remix
14.Tiesto - I Will Be Here (Wolfgang Gartner Remix
15.Tiesto Feat Kele Okereke - It's Not The Things You Say (Tiesto Remix
16.Tiesto Feat Kele Okereke - It's Not The Things You Say (Filthy Dukes Remix
17.Tiesto Feat Calvin Harris - Century (TV Rock Remix
18.Tiesto Feat Calvin Harris - Century (Tiesto Remix
19.Tiesto Feat Cary Brothers - Here On Earth (Alex Kunnari Remix