Tracklist
| Sing A Happy Song | 3:33 |
| One In A Million (Girl) | 3:53 |
Versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| ZS9 3707 | The O'Jays | Sing A Happy Song / One In A Million (Girl) (7") | Philadelphia International Records | ZS9 3707 | US | 1979 |
| PIR 7825 | O'Jays* | Canta Una Cancion Feliz (7") | Philadelphia International Records | PIR 7825 | Spain | 1979 |
| ZS9 3707 | The O'Jays | Sing A Happy Song (7", Promo) | Philadelphia International Records | ZS9 3707 | US | 1979 |
| PIR 7825 | The O'Jays | Sing A Happy Song / One In A Million (Girl) (7") | Philadelphia International Records | PIR 7825 | Netherlands | 1979 |
| PIR S 7825 | The O'Jays | Sing A Happy Song / One In A Million (Girl) (7", Single, Promo) | Philadelphia International Records | PIR S 7825 | Germany | 1979 |
| S PIR 7825 | The O'Jays | Sing A Happy Song / One In A Million Girl (7", Single, Promo) | Philadelphia International Records | S PIR 7825 | UK | 1979 |
| S PIR 7825 | The O'Jays | Sing A Happy Song (7", Inj) | Philadelphia International Records | S PIR 7825 | UK | 1979 |
| S PIR 7825 | The O'Jays | Sing A Happy Song (7", Single) | Philadelphia International Records | S PIR 7825 | UK | 1979 |
| PS 1030 | The O'Jays | Sing A Happy Song (7", Single) | Philadelphia International Records | PS 1030 | Australia | 1979 |
| PS 1030 | The O'Jays | Sing A Happy Song (7", Single) | Philadelphia International Records | PS 1030 | New Zealand | 1979 |
| PIR S 7825, PIR7825 | The O'Jays | Sing A Happy Song (7", Single) | Philadelphia International Records, Philadelphia International Records | PIR S 7825, PIR7825 | Germany | 1979 |
