Marty O'Brien is a professional bassist who is originally from Rhode Island and currently based in Los Angeles. Having played bass for numerous touring acts as well as recording sessions for rock and pop artists plus various television and film scores, O'Brien has a discography that is, overall, somewhat diverse while also maintaining a solid background in the hard rock and metal music genres. His live credits include playing bass on tour for bands such as Disturbed, Tommy Lee, Static-X, Methods of Mayhem, Lita Ford, and many others. He has performed on three different Ozzfest tours, each time with a different band (Ozzfest's 1998, 2000, 2002). Also a busy session-bassist, most of this work taking place in his current home base of Los Angeles, O'Brien has recorded with numerous artists such as Celine Dion, Chris Cornell, Brian McKnight, Tommy Lee, Lindsay Lohan, Lita Ford and Kelly Clarkson; the later includes the number one single, Because of You from the Grammy award winning album titled Breakaway.