| song | duration | artist | year |
|---|
| O Sole Mio | 04.07 | Mario Lanza | 2010 |
| Ob Blond, Ob Braun, Ich Liebe Alle Frauen | 02.31 | Jan Kiepura | 1935 |
| Ochtend In De Stad | 04.05 | Herman van Veen | 1972 |
| Ode To Joy | 02.56 | New London Chorale | 1990 |
| Odi et Amo | 02.19 | koor Karakter | 2018 |
| Oerend hard | 03.43 | Normaal | 1977 |
| Off The Wall | 04.05 | Michael Jackson | 2016 |
| Oh babe, what would you say | 03.10 | Huricane Smith | 1972 |
| Oh Boy | 02.52 | Mud | 1975 |
| Oh! Carol | 02.17 | Niel Sedaka | 1961 |
| Oh darling | 03.10 | Theo Diepenbrock | 1978 |
| oh happy day | 05.07 | the Edwin Hawkins singers | 1969 |
| Oh La La La (Radio Edit) | 03.30 | 2 Eivissa | 1997 |
| Oh, Pretty Woman | 03.03 | Roy Orbison | 1964 |
| Old Country Road | 03.05 | Grant & Forsyth | 1993 |
| Oliver's Song | 03.07 | New London Chorale | 1995 |
| On My Own | 03.39 | Charles Burnham | 1992 |
| On Silent Wings | 04.16 | Tina Turner | 1996 |
| On the radio | 03.51 | Donna Summer | 1979 |
| On The Sentimental Side | 02.52 | Bing Crosby | 1962 |
| On The Sunny Side Of The Street | 02.30 | Nat King Cole | 1956 |
| On The Sunny Side Of The Street | 03.00 | Billie Holiday | 1944 |
| On the Wings of a Nightingale | 02.32 | Everly Brothers | 1984 |
| Once Upon A Time In The West | 03.57 | Ed Starink | 1968 |
| One | 04.32 | U2 | 1991 |
| One | 02.45 | Mantovani & His Orchestra | 2000 |
| One Day More! | 03.24 | Les Misérables Broadway Cast | 1992 |
| One Fine Day | 02.47 | New London Chorale | 1991 |
| One Moment Your Mind | 04.21 | Total Touch | 1997 |
| One Night | 02.57 | Mud | 1975 |
| One Shining Moment | 04.47 | Diana Ross | 1991 |
| One step Away | 04.22 | New London Chorale | 1993 |
| One Way Wind | 03.37 | the cats | 1971 |
| Only love | 04.08 | Nana Mouskouri | 1984 |
| Only Love | 04.29 | Laurens v. Rooyen | 1986 |
| Only the Lonely | 02.33 | Roy Orbinson | 1960 |
| Only Words | 03.53 | New London Chorale | 1991 |
| Only You | 03.11 | Percy Sledge | 1966 |
| Only you know and I know | 02.50 | Kimm | 1976 |
| Ooh, I love it | 03.38 | The Salsoul orchestra | 1983 |
| Open Arms | 03.27 | Mariah Carey | 1995 |
| Open your heart | 03.43 | Madona | 1987 |
| Opzij | 03.14 | Herman van Veen | 1979 |
| Orchidee | 02.36 | Dorus | 1958 |
| Our lady of the well | 02.58 | Johnny Rivers | 1971 |
| Our song | 02.57 | Guy's 'n' Doll's | 1980 |
| Out In The Streets | 03.03 | Blondie | 1975 |
| Out Of Africa | 03.28 | Helmut Lotti | 1998 |
| Out Of Africa | 04.30 | John Barry | 1992 |
| Out Of This World | 03.31 | Sammy Davis Jr. | 1961 |
| Over & Over | 03.58 | Puf Johnson | 1997 |
| Over 25 Jaar | 03.01 | The Ramblers | 1952 |
| Over de muur | 03.28 | Klein Orkest | 1984 |
| Over The Rainbow | 03.10 | Geraldo & his orchestra | 1939 |
| Oxun | 02.52 | Santana | 1982 |
| Oxygene | 03.11 | Jean-Michel Jarre | 1976 |
