Tracklist Hide Credits
| 1 | What Is Love 2K9 (Klaas Radio Edit) | 3:24 |
| 2 | What Is Love 2K9 (Klaas Club Mix) | 5:28 |
| 3 | What Is Love 2K9 (Klaas Impact Mix Edit) | 3:24 |
| 4 | What Is Love 2K9 (Klaas Impact Mix) | 5:28 |
| 5 | What Is Love 2K9 (Bodybangers Remix Edit)Remix – Bodybangers |
3:37 |
| 6 | What Is Love 2K9 (Bodybangers Remix)Remix – Bodybangers |
6:50 |
| 7 | What Is Love 2K9 (Cansis Remix Edit)Remix – Cansis |
3:10 |
| 8 | What Is Love 2K9 (Cansis Remix)Remix – Cansis |
5:14 |
| 9 | What Is Love 2K9 (Spinnin Elements Remix Edit)Remix – Spinnin Elements |
3:43 |
| 10 | What Is Love 2K9 (Spinnin Elements Remix)Remix – Spinnin Elements |
6:01 |
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 88697643142 | Klaas Meets Haddaway | Klaas Meets Haddaway - What Is Love 2K9 (CD, Maxi, Enh) | Coconut | 88697643142 | France | 2009 |
| DO IT 918 | Klaas Meets Haddaway | Klaas Meets Haddaway - What Is Love 2k9 (12") | Do It Yourself Entertainment | DO IT 918 | Italy | 2009 |
| 4250282804049 | Klaas Meets Haddaway | Klaas Meets Haddaway - What Is Love 2k9 (10xFile, MP3) | Coconut | 4250282804049 | Germany | 2009 |
| COCMU 406 | Klaas Meets Haddaway | Klaas Meets Haddaway - What Is Love 2K9 (CD, Single) | Coconut | COCMU 406 | Germany | 2009 |
| KLASS 1-P | Klaas Meets Haddaway | Klaas Meets Haddaway - What Is Love 2K9 (CDr, Maxi, Promo) | M6 Music Label | KLASS 1-P | France | 2009 |
