- 1. O Trio do Brasil
- 2. O'Bros
- 3. O'Callaghan & Kearney
- 4. O'Rourke, Declan
- 5. O-Zone
- 6. o.n.a.
- 7. O.S.T.R.
- 8. Oasis
- 9. Oaths, The
- 10. Obel, Agnes
- 11. Oberst, Conor
- 12. Obey the Brave
- 13. Obispo, Pascal
- 14. OBK
- 15. Obojeni program
- 16. Obsidia
- 17. Ocasek, Ric
- 18. Ocean Blue, The
- 19. Ocean Colour Scene
- 20. Ocean Drive
- 21. Ocean Grove
- 22. Ocean of Grief
- 23. Ocean Wisdom
- 24. Ocean, Billy
- 25. Oceana
- 26. Oceanic
- 27. Oceans Ate Alaska
- 28. Ochoa, Eliades
- 29. Ochs, Phil
- 30. Octavia
- 31. Octavian
- 32. October Falls
- 33. Oddisee
- 34. Oddział Zamknięty
- 35. Odell, Tom
- 36. ODESZA
- 37. Odetta
- 38. Odezenne
- 39. Odisseo
- 40. Odua, Yaniss
- 41. ODV, Timo
- 42. Odyssey
- 43. Oesch's die Dritten
- 44. Of Mice & Men
- 45. Of Monsters and Men
- 46. of Montreal
- 47. of Verona
- 48. Offenbach, Jacques
- 49. Offishall, Kardinal
- 50. Offset
- 51. Offspring, The
- 52. Oh Hellos, The
- 53. Oh Land
- 54. Oh Sees
- 55. Oh The Larceny
- 56. Oh Wonder
- 57. Oh, Sleeper
- 58. Ohio Express
- 59. Oingo Boingo
- 60. Ojos de Brujo
- 61. OK Go
- 62. OK KID
- 63. Okmalumkoolkat
- 64. Ola Runt
- 65. Olamide
- 66. Olander, Jeremy
- 67. Olcay, Zuhal
- 68. Old Crow Medicine Show
- 69. Old Dominion
- 70. Old Firm Casuals, The
- 71. Old Gods of Asgard
- 72. Old Man Canyon
- 73. Old Man Saxon
- 74. Oldelaf
- 75. Oldfield, Mike
- 76. Olé Olé
- 77. Olexesh
- 78. Oli P.
- 79. Olin and the Moon
- 80. Olivas, Alfredo
- 81. Ölmez, Orhan
- 82. Olomidé, Koffi
- 83. Olsen, Angel
- 84. Olstead, Renee
- 85. Olympic Ayres
- 86. Omaji, Tim
- 87. Omar
- 88. Omarion
- 89. OMB Peezy
- 90. Ombladon
- 91. Omega
- 92. OmenXIII
- 93. Omnia
- 94. Önal, Füsun
- 95. Öncel, Nazan
- 96. One Desire
- 97. One Direction
- 98. ONE OK ROCK
- 99. One Two
- 100. One, Res
- 101. OneRepublic
- 102. OneUps, The
- 103. OnklP & Slektningene, De Fjerne
- 104. Only Ones, The
- 105. Onyx
- 106. Onze:20
- 107. Oobie
- 108. Oomph!
- 109. Oosterhuis, Trijntje
- 110. Opća opasnost
- 111. Open Mike Eagle
- 112. Opgezwolle
- 113. Ophidian
- 114. Opick
- 115. Opposites, The
- 116. Oques Grasses
- 117. Ora, Rita
- 118. Orbison, Roy
- 119. Orchestral Manoeuvres in the Dark
- 120. Ordinary Boys, The
- 121. Ordo Rosarius Equilibrio
- 122. Oreiro, Natalia
- 123. Oreja de Van Gogh, La
- 124. Orhan, Mahmut
- 125. Orifice Vulgatron
- 126. Original Alpenland Quintett
- 127. Original Naabtal Duo
- 128. Orishas
- 129. Orlek
- 130. Orloff, Peter
- 131. Orozco, Antonio
- 132. Orrico, Stacie
- 133. Ortaç, Serdar
- 134. Ortaçgil, Bülent
- 135. Ortel
- 136. Orton, Beth
- 137. Orville Peck
- 138. Orwells, The
- 139. Osborne, Jeffrey
- 140. Osbourne, Ozzy
- 141. Oshun
- 142. Osibisa
- 143. Osiris, YK
- 144. Oslo Ess
- 145. Osment, Emily
- 146. Oso, El
- 147. Otep
- 148. Other People Place, The
- 149. Other, The
- 150. Otis Stacks
- 151. Otnicka
- 152. Otsochodzi
- 153. Ott, Kerstin
- 154. Ottaviani, Giuseppe
- 155. Otto Knows
- 156. Ötzi, DJ
- 157. Où est le Swimming Pool
- 158. Ouellet, Karim
- 159. Ougenweide
- 160. Our Hollow, Our Home
- 161. Our Lady Peace
- 162. Our Last Night
- 163. OuterSpace
- 164. Outfield, The
- 165. Outhere Brothers, The
- 166. OutKast
- 167. Outlandish
- 168. Outlaw, Sam
- 169. Outlawz
- 170. OV7
- 171. Over, Lary
- 172. OverDoz.
- 173. Overstreet, Paul
- 174. Overtones, The
- 175. Owen, Jake
- 176. Owen, Mark
- 177. Owens, Buck
- 178. Owens, Buck, and His Buckaroos
- 179. Owl City
- 180. Owlle
- 181. Ownglow
- 182. Oxa, Anna
- 183. Oxmo Puccino
- 184. Özbey, Merve
- 185. Ozcan, Ummet
- 186. Özen, Gökhan
- 187. Özen, Sinan
- 188. Özgün
- 189. Ozomatli
- 190. Ozuna
- 191. O‐Town
- 192. O’Bryan
- 193. O’Connor, Sinéad
- 194. O’Day, Anita
- 195. O’Donis, Colby
- 196. O’Jays, The
- 197. O’Neal, Alexander