There are six or more artists called CK:

1. CK is a Swedish rapper who debuted with his single "På Rosa Moln". His album "Luften är fri!" was first released in 2005. Name is unknown for most people and he'd like to keep it that way.

2. ck is an independent laptop hip-hop artist from San Francisco. He self-produced, wrote, and recorded his entire debut album, Kind of a Big Deal, on his laptop while attending college at Columbia University, and donates all proceeds to UNICEF.
http://www.ckhiphop.net

3. CK is a Polish punk-rock band from Ostrołęka, founded in 2005.

4. CK, or "The Hawk" as he is aliased, is a Danish clubber. He focuses his energy on creating Eurodance / Trancecore tracks, but adding his own unique twist and special melodies. As he says; "I want it to be something that other people will find phat. It has to be what people ask for, however, I want my music to have characteristics, and I want it to differ from the rest out there, in some way or another".
At the moment, CK is working on his first album; "Motion"

5. CK is an underground DJ. CK stands for his name, Chris King. He focuses on Drum 'n' Bass mixes.

6. cK is an underground DJ from Germany. "cK" stands for his name, Christoph Kubik.

7. ck aka the grim speaker is a UK based producer Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.