O is for
| Artist | Song | |
| Daft Punk | One More Time | |
| Funkadelic | One Nation Under A Groove | |
| Amerie | One Thing | |
| Sugababes | Overload | |
| Talking Heads | Once in a Lifetime | |
| Can | Oh Yeah | |
| Prodigy | Out of Space | |
| Hot Chip | Over and Over | |
| Architecture in Helsinki | Owls Go, the | |
| Wire | Outdoor Miner | |
| At the Drive-In | One Armed Scissor | |
| Garbage | Only Happy When It Rains | |
| Simon and Garfunkel | Only Living Boy in New York, the | |
| Roy Orbison | Only the Lonely | |
| Beautiful South | Old Red Eyes is Back | |
| Cat Stevens | Oh Very Young | |
| Canned Heat | On the Road Again | |
| Divine Comedy | Our Mutual Friend | |
| Aimee Mann | One | |
| Johnny Cash | One | |