œuvres musicales classiques
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Onéguine | Oeuvre | 10 | 0.0 |
| Oochigeas | Oeuvre | 1 | 3.6 |
| Ooh Aah... Just A Little Bit | Oeuvre | 9 | 1.1 |
| Ooh! My Soul | Oeuvre | 7 | 0.1 |
| Oops!... I Did It Again | Oeuvre | 28 | 16.7 |
| Op. 120, No. 1 | Oeuvre | 2 | 0.1 |
| Opalite | Oeuvre | 16 | 0.0 |
| Open Arms | Oeuvre | 14 | 0.0 |
| Open Goldberg Variations | Concept | 5 | 3.1 |
| Ophélie | Oeuvre | 2 | 0.6 |
| Opiate | Oeuvre | 16 | 0.0 |
| Opium | Oeuvre | 1 | 11.0 |
| Opportunities (let’s Make Lots Of Money) | Oeuvre | 10 | 0.5 |
| Opéra Tchèque | Oeuvre | 3 | 0.1 |
| Opéras Hambourgeois Perdus de Haendel | Oeuvre | 5 | 0.1 |
| Opéras Perdus de Monteverdi | Oeuvre | 6 | 2.0 |
| Or Che di Febo Ascosi | Oeuvre | 1 | 0.1 |
| Orange Blossom Special | Oeuvre | 4 | 2.8 |
| Oratorio Per la Settimana Santa | Oeuvre | 1 | 0.3 |
| Oratorio de L'ascension | Oeuvre | 13 | 2.0 |
| Oratorio de Noël | Oeuvre | 28 | 11.8 |
| Oratorio de Noël | Oeuvre | 9 | 3.5 |
| Oratorio de Pâques | Oeuvre | 16 | 3.2 |
| Orbits | Oeuvre | 1 | 0.0 |
| Ordinary World | Oeuvre | 16 | 9.7 |
| Ordo Virtutum | Oeuvre | 7 | 0.4 |
| Oreste | Oeuvre | 9 | 0.5 |
| Oresteïa | Oeuvre | 6 | 0.9 |
| Orfeo | Oeuvre | 7 | 3.4 |
| Orfeo | Oeuvre | 3 | 0.1 |
| Orff-schulwerk | Oeuvre | 17 | 7.8 |
| Organ²/aslsp | Oeuvre | 22 | 9.9 |
| Orgelbüchlein | Oeuvre | 15 | 4.8 |
| Orient & Occident | Oeuvre | 3 | 0.3 |
| Orient et Occident | Oeuvre | 1 | 0.0 |
| Orientale : Valse Pour Piano | Oeuvre | 1 | 0.0 |
| Origo | Oeuvre | 16 | 0.0 |
| Orion | Oeuvre | 1 | 0.6 |
| Orion | Oeuvre | 14 | 5.2 |
| Orion | Oeuvre | 2 | 0.7 |
| Orion | Oeuvre | 2 | 0.0 |
| Orion | Oeuvre | 3 | 1.2 |
| Orlando | Oeuvre | 18 | 4.6 |
| Orlando Finto Pazzo | Oeuvre | 12 | 13.1 |
| Orlando Furioso | Oeuvre | 15 | 4.7 |
| Orlando Paladino | Oeuvre | 12 | 1.9 |
| Ormindo | Oeuvre | 9 | 0.0 |
| Ormurin Langi | Oeuvre | 17 | 0.3 |
| Ornamente | Oeuvre | 1 | 0.2 |
| Ornithology | Oeuvre | 8 | 0.3 |