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Dänemark| Label: | I Pop IPO2000-3 |
| Genre: | Rock |
| Format: | CD (Single) |
| 1 | It's Summer In My Heart (Radio Edit) | 3:26 |
| 2 | It's Summer In My Heart (Extended Summer Mix) | 4:08 |
| 3 | Hearing Is Believing (Say Colour Album Trailer Mix) | 2:53 |
| Label: | Not On Label none |
| Genre: | Electronic, Rock |
| Style: | House |
| Format: | CD (Single , Promo) |
| 1 | It's Summer In My Heart (Radio Mix) | 4:05 |
| 2 | It's Summer In My Heart (Club Mix) | 6:33 |
| Label: | Edel Records ERE 47595/0047595 ERE |
| Genre: | Rock |
| Format: | CD (Maxi-Single) |
| 1 | It's Summer In My Heart (Radio Edit) | 3:26 |
| 2 | It's Summer In My Heart (Extended Summer Mix) | 4:08 |
| 3 | It's Summer In My Heart (Instrumental Sunshine Mix) | 3:30 |
| 4 | It's Summer In My Heart (Instrumental Mix) | 3:30 |
| Label: | Edel Records 0044905STP |
| Genre: | Rock |
| Format: | CD (Maxi-Single) |
| 1 | It's Summer In My Heart (Radio Edit) | 3:26 |
| 2 | It's Summer In My Heart (Extended Summer Mix) | 4:08 |
| 3 | It's Summer In My Heart (Instrumental Sunshine Mix) | 3:30 |
| 4 | It's Summer In My Heart (Instrumental Mix) | 3:30 |
