Tracklist
| Happy Song | 5:40 |
| Challenger | 5:30 |
| Happy Birthday (To My Mammy) | 4:55 |
Versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| GDC 2015-8 | Baby's Gang | Happy Song & Challenger (CD, Maxi) | ZYX Music | GDC 2015-8 | Germany | 1995 |
| GDC 2015-8 | Baby's Gang | Happy Song & Challenger (CD, Maxi, RE) | ZYX Music | GDC 2015-8 | Germany | 2001 |
