| Label: | Fantasy F-762 |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (7" , Single) |
| A | Happy Music » Written-By: Donald Byrd | 3:04 |
| B | Love So Fine » Written-By: Joe Hall | 4:50 |
| Label: | Fantasy F-762-D |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (12" , Promo) |
| A | Happy Music | 6:06 |
| B | Happy Music | 6:06 |
| Label: | Fantasy F-762 |
| Genre: | Funk / Soul |
| Style: | Funk, Disco |
| Format: | Vinyl (12" , Reissue) |
| A | Happy Music | 6:08 |
| B1 | Happy Music | 7:13 |
| B2 | Love So Fine | 4:48 |
| Label: | Fantasy FTC 129 |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (7" , Promo) |
| A | Happy Music | 3:04 |
| B | Love So Fine | 4:50 |
| Label: | Fantasy FTC 129 |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (7" , Single) |
| A | Happy Music | 3:04 |
| B | Love So Fine | 4:50 |
| Label: | Fantasy K6285 |
| Genre: | Funk / Soul, Pop |
| Style: | Funk |
| Format: | Vinyl (7") |
| A | Happy Music | 2:59 |
| B | Love So Fine | 4:46 |
| Label: | Fantasy F-762-A-S |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (7" , Promo , Mono , Stereo) |
| A | Happy Music » Written-By: Donald Byrd | 3:04 |
| B | Happy Music | 3:04 |
| Label: | Fantasy 5C 006-97561 |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (7" , Single , 45 RPM , Single , Stereo) |
| A | Happy Music » Written-By: Donald Byrd | 3:04 |
| B | Love So Fine » Written-By: Joe Hall | 4:50 |
| Label: | Fantasy 5C 006-97561 |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (7" , Single , 45 RPM) |
| A | Happy Music » Written-By: Donald Byrd | 3:04 |
| B | Love So Fine » Written-By: Joe Hall | 4:50 |
| Label: | Bellaphon BF 18408 |
| Genre: | Funk / Soul |
| Style: | Funk |
| Format: | Vinyl (7" , Single , 45 RPM) |
| A | Happy Music » Written-By: Donald Byrd | 3:04 |
| B | Love So Fine » Written-By: Joe Hall | 4:50 |