On The Backs Of Angels John Petrucci, John Myung, Dream Theater, Jordan Rudess Piano, Guitar, Drum, Bass guitar, Drums Rock, Folk, Art-Rock/Progressive, Metal, Heavy Metal
Onset Keith Nelson, Stevie D. Guitar, Electric guitar Alternative Metal, Hard Rock, Post-Grunge, American Trad Rock, Metal
Open Eyes Wayne Swinny, Josey Scott, Allie Heard, Michael Baskette Guitar, Electric guitar New Age, Rock, Metal, Pop Rock
Open Your Eyes Deryck Jayson Whibley, Bonnie McKee, Deryck Whibley, Eric Weaver, Alter Bridge, Aaron Lewis Guitar, Drums, Piano, Drum Set, Electric guitar Contemporary Christian, Alternative Pop/Rock, Indie Rock, Pop, alternative
Operation: Mindcrime Michael Wilton, Chris DeGarmo, Geoff Tate Guitar Metal, Album Rock, Rock, Progressive Metal, Hard Rock
Open Up Now Jonathan Davis, Atticus Ross, Reginald Arvizu, David Silveria, James Shaffer, Scott Spock Guitar Metal, Pop Rock, Rock
Operation Ground And Pound Vadim Pruzhanov, Herman Li, Sam Totman, ZP Theart Guitar Pop Rock, Metal, Rock, Folk, Pop
Opium Of The People Slipknot, Chris Fehn, Corey Taylor, M. Shawn Crahan, Sid Wilson, Shawn Crahan Guitar, Electric guitar Rock, Metal
Orchids Shawn Economaki, Josh Rand, Joel Ekman, Stone Sour Electric guitar, Guitar Alternative Rock, Metal, Rock
ORDINARY MAN Billy Walsh, Ozzy Osbourne, Elton John, Duff McKagan, Chad Smith, Andrew Watt Guitar, Piano, Electric guitar Album Rock, Gospel, Hard Rock, Pop Rock, Pop
On Broken Glass Matt DeVries, Mark Hunter, Rob Arnold Guitar, Electric guitar Pop Rock, Metal, Rock, Folk, Heavy Metal
Once Bitten Twice Shy Ian Hunter, Great White Guitar, Piano, Electric guitar Blues, Pop, Jazz, Album Rock, Folk
Orinoco Flow Nicky Ryan, Celtic Woman, Sarah Cellobat Chaffee, Roma Ryan, Kirby Shaw Guitar, Violin, Viola, Cello, Soprano, Piano Folk World & Country, Easy Listening, alternative, Celtic, Pop
Original Prankster Dexter Holland, The Offspring Bass guitar, Guitar, Bass Folk, Pop Rock, Rock, Children, punk
Orion Cliff Burton, Metallica, James Hetfield, Gabriela Quintero Lopez, Lars Ulrich, Rodrigo y Gabriela Guitar, Electric guitar Rock, Hard Rock, Pop Rock, Pop, Folk
Ose Shalom John Leavitt, Traditional Hebrew Text, Judith Silver, Traditional Hebrew Song, N. Hirsh, Richard Cook Bass, Double Bass, Piano, Soprano, Viola Metal, Folk World & Country, Gospel, Folk
Our Lawyer Made Us Change The Name Of This Song So We Wouldn't Get Sued Peter Wentz, Joe Trohman, Patrick Stumph, Pete Wentz, Andrew Hurley, Patrick Stump Guitar, Electric guitar Alternative Rock, Punk-Pop, Rock, Emo, Folk
Our Truth Cristiano Migliore, Cristina Scabbia, Cristiano Mozzati, Andrea Ferro, Lacuna Coil, Marco Biazzi Guitar, Electric guitar Black Metal, Goth Metal, Pop, Progressive Metal, Metal
