 Once and Future Band |
 Outsidaz |
 One Day Baby |
 Oak House |
 Outbreak |
 Osrin |
 One For All |
 Originals |
 Organize |
 OUTLYA |
 One Be Lo |
 Orbiter |
 ONEMOREMASK |
 Overflow |
 Oscarcito |
 Olodum |
 Overstreet |
 Out of Phase |
 Openwater |
 OHM |
 Offbeat |
 Overthrow |
 Olmos |
 Ordog |
 Original Broadway Cast |
 Ottawa |
 Orquestra do Estado de Mato Grosso |
 Obywatel G.C. |
 Oscar Key Sung |
 Owen Gray |
 Oslo Gospel Choir |
 O Teatro Mágico |
 Oskar Linnros |
 O |
 Olly Alexander |
 Over the Voids... |
 October 31 |
 Otis Gibbs |
 OYABUN |
 Omnom |
 Olga Verbitchi |
 Old Skool Metal Masters |
 OSKIDO |
 Oslo Parks |
 Owen Norton |
 Orne |
 Orion Too |
 On Dead Waves |
 O Captain! My Captain! |
 Oliver Jones |
 Open Hand |
 Orquesta Cinerama |
 Oliver Twizt |
 Origo |
 Omoh |
 Oscar Brown Jr. |
 One Inch Punch |
 Olu Dara |
 Olga Lounova |
 One In A Million |
 Obus |
 Omega |
 Odd Nordstoga |
 One True Pairing |
 Olivia Nelson |
 On Being Human |
 On The Last Day |
 Oliver/Dawson Saxon |
 Oliver Onions |
 OverTime |
 OCD: Moosh & Twist |
 Offa Rex |
 Octave |
 Origami |
 Out of Black |
 Ox |
 Our Past Days |
 Oh Laura |
 Old Growth |
 Oslo Ess |
 Owen Clarke |
 Ormonde |
 OBB |
 Overcome |
 Obsidian Tongue |
 OG Eastbull |
 O Quam Tristis |
 Overlap |
 One Block Radius |
 OH, MANHATTAN |
 One Chance |
 Obrafour |
 Overtone |
 One More Time |
 Olan |
 Oliviero De Fabritiis |
 Omar Dean |
 Oliva |
 OGB |
 Oliver Hart |
 Orange & Lemons |
| Oliver Boyd and the Remembralls |
 OG3NE |
 Orquesta Adolescentes |
 Outwild |
 Ocean Heights |
 Onze:20 |
 Outer Space |
 ONODERA |
 ozi |
 Ouija |
 outsideOUTSIDE |
 October File |
 OG |
 olsem |
 Oh Mercy |
 Only Son |
 One Love |
 One Fine Day |
 Otis |
 Olly Knights |
 Oh La La ! |
 Odd Project |
 OVERLAPS |
 Otra Puse |
 Orient Fall |
 Oscar Hammerstein II |
 Overmaster |
 Olympia |
 OIJ |
 Oh The Blood |
 Oriente |
 Omar Solaiman |
 Out of Sight |
 Or, the Whale |
 Ola & The Janglers |
 Olivia Noelle |
