| Official |
|---|
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | PIR 7825 | [none] |
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | PIR S 7825, PIR7825 | [none] |
| Canta Una Cancion Feliz = Sing a Happy Song / Una (Chica) En Un Millon = One in a Million (Girl) | O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | PIR 7825 | [none] |
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | S PIR 7825 | [none] |
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | S PIR 7825 | [none] |
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | ZS9 3707 | [none] |
| Sing a Happy Song / Get on Out and Party | The O’Jays | 12" Vinyl | 2 | | Philadelphia International Records | 4Z8 3708 | [none] |
| Sing a Happy Song / Get on Out and Party | The O’Jays | 12" Vinyl | 2 | | Philadelphia International Records | 4Z8 3708 | [none] |
| Promotion |
|---|
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | S PIR 7825 | [none] |
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | PS 1030 | [none] |
| Sing a Happy Song / One in a Million (Girl) | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | PIR S 7825 | [none] |
| Sing a Happy Song | The O’Jays | 7" Vinyl | 2 | | Philadelphia International Records | ZS9 3707 | [none] |