Disc1
| 1 | What Is Love 2K9 (Klaas radio edit) | Klaas Meets Haddaway | 3:26 |
| 2 | What Is Love 2K9 (Klaas Impact mix edit) | Klaas Meets Haddaway | 3:26 |
| 3 | What Is Love 2K9 (Bodybangers remix edit) | Klaas Meets Haddaway | 3:39 |
| 4 | What Is Love 2K9 (Spinnin Elements remix edit) | Klaas Meets Haddaway | 3:46 |
| 5 | What Is Love 2K9 (Cansis remix edit) | Klaas Meets Haddaway | 3:12 |
| 6 | What Is Love 2K9 (Klaas club mix) | Klaas Meets Haddaway | 5:25 |
| 7 | What Is Love 2K9 (Klaas Impact mix) | Klaas Meets Haddaway | 5:25 |
| 8 | What Is Love 2K9 (Bodybangers remix) | Klaas Meets Haddaway | 6:52 |
| 9 | What Is Love 2K9 (Spinnin Elements remix) | Klaas Meets Haddaway | 5:58 |
| 10 | What Is Love 2K9 (Cansis remix) | Klaas Meets Haddaway | 5:15 |