1. O G Money (1 albums)

2. O'Ryan (1 albums)

3. O-town (4 albums)

4. O-zone (2 albums)

5. Oak Ridge Boys (1 albums)

6. Oasis (15 albums)

7. Obie Bermúdez (1 albums)

8. Obie Trice (2 albums)

9. Obituary (1 albums)

10. Obsessed, The (2 albums)

11. Ocean Colour Scene (7 albums)

12. October Fall (1 albums)

13. Of Mice and Men (1 albums)

14. Of Montreal (2 albums)

15. Off Side (2 albums)

16. Office (1 albums)

17. Ofra Haza (5 albums)

18. Oh Land (1 albums)

19. OH MY JOSH (1 albums)

20. Oingo Boingo (10 albums)

21. Ok Go (4 albums)

22. Ol' Dirty Bastard (6 albums)

23. Old 97's (6 albums)

24. Oleander (5 albums)

25. Oli Silk (1 albums)

26. Olive (3 albums)

27. Oliver Jones & Hank Jones (1 albums)

28. Olivia (2 albums)

29. Olivia Newton-John (24 albums)

30. Olly Murs (1 albums)

31. Olsen Brothers, The (1 albums)

32. Omar Afuni (3 albums)

33. Omarion (4 albums)

34. Omd (10 albums)

35. Omnisoul (1 albums)

36. Once Nothing (3 albums)

37. One Chance (1 albums)

38. One Direction (2 albums)

39. One Last Fighter (1 albums)

40. One Less Reason (2 albums)

41. One Voice (3 albums)

42. One-Eyed Doll (1 albums)

43. OneRepublic (5 albums)

44. Oneway (1 albums)

45. Onyx (4 albums)

46. Oomph! (5 albums)

47. Open Skyz (1 albums)

48. Operation Ivy (1 albums)

49. Opeth (3 albums)

50. Opgezwolle (1 albums)

51. OPM (1 albums)

52. Optiganally Yours (1 albums)

53. Orange Monkey (3 albums)

54. Ordinary Boys, The (2 albums)

55. Organized Konfusion (4 albums)

56. Orgy (4 albums)

57. Orianthi (1 albums)

58. Originoo Gunn Clapazz (3 albums)

59. Orishas (1 albums)

60. Ornatos Violeta (1 albums)

61. Orphan Twins (1 albums)

62. Orphaned Land (1 albums)

63. Orson (1 albums)

64. Os Mutantes (1 albums)

65. Os Paralamas do Sucesso (1 albums)

66. OST (1 albums)

67. Osvaldo Murti (1 albums)

68. Otah-hiah (1 albums)

69. Otep (5 albums)

70. Our Lady Peace (9 albums)

71. Ours (2 albums)

72. Out Of Eden (2 albums)

73. Outbox (1 albums)

74. Outcast Youth (1 albums)

75. Outfield (6 albums)

76. Outkast (8 albums)

77. Outlandish (3 albums)

78. Outlawz (1 albums)

79. OV7 (2 albums)

80. Owl City (4 albums)

81. Oz Striker (1 albums)

82. Ozma (1 albums)

83. Ozomatli (1 albums)

84. Ozzy Osbourne (13 albums)