Orange Juice Melanie Martinez, Michael Keenan Leary, Dario D'aversa, Steven King Guitar Folk World & Country, Indie Pop, Alternative Pop/Rock, Pop
O Regresso de chico Trigueira Rafael Leme Alto Saxophone, Tenor Saxophone, Tenor, Viola Folk World & Country, Classical, Jazz, Latin
Open the Door for Three Traditional Fiddle Tunes, Heather M Music Piano, Violin, Bass guitar, Bass Folk, Folk World & Country
Orion Cliff Burton, Metallica, James Hetfield, Gabriela Quintero Lopez, Lars Ulrich, Rodrigo y Gabriela Guitar, Electric guitar Rock, Hard Rock, Pop Rock, Pop, Folk
Oscail an Doras Bill Whelan, John Ivor Holland Piano Stage & Screen, Folk, Musical, Broadway, Folk World & Country
Opus 40 - In the opposite corner John Trie Guitar, Double Bass, Electric guitar, Bass, Drum Set, Bass guitar Jazz, Folk World & Country, Rock, Pop
Opus 70 by John Trie John Trie Organ, Bass guitar, Guitar, Electric guitar, Bass Folk World & Country, Jazz, Blues
Opus I Frank P Johnson Cello, Bass, Piano, Double Bass Folk World & Country, Contemporary Christian, Gospel
Oracle Morgan Lander, Mercedes Lander, Bisdré Santos Bassoon, Viola, Cello, Flute, Bass, Saxophone Rock, Folk World & Country, Stage & Screen
