Several artists go by the title o2. 1) A Japanese hip hop artist from MSC 2) Carsten ”o2” Ohlsen was born in 1980 and is known for his remixes of game music from the Commodore 64. 3) o2 consists of 1 member whose real name is Clayton Otto. Clayton does all production, recording and song/lyric writing with the exception of guest artist features. This is the 3rd major project from this artist. In 1999, O2 was in the rock group Chaser that had the experience to open for the major rock group Korn in the summer of 2000 in Fargo, ND. The 2nd project was with the group CommonlinQ in 2003, which was a merging of hip-hop and hard rock. O2 had many ideas that could not be expressed in a group format.. This led to "The SkyLab" which was finished in October of 2006. 4) O2 is Mike Wells (5.25, Gridlock, Under) 5) o2.(a.k.a. Squared Head) is a dub/dubstep producer 6) Expermental rap band from Lithuania 7) Serbian-North Macedonian project, consisted of Igor Simić, Lena Kovačević, Marko Louis, Yanx, Ivana Peters and Tamara Todevska