- Prezioso/Marvin - The Riddle (Radio Edit)
- Cécile Corbel - The Riddle
- Gigi D'Agostino - The Riddle
- Five for Fighting - The Riddle (Album Version)
- Jaxx Vega/Nik Kershaw - The Riddle (Original Mix)
- Top 40 - The Riddle (Radio Edit)
- Various Artists - The Riddle (Radio Edit)
- 祖堅正慶/古川亮 - The Riddle
- Ken Arai - The Riddle
- Audiotricz/Diandra Faye - The Riddle
- Nik Kershaw - The Riddle
- Gigi D'Agostino - The Riddle
- XD - The Riddle
- Five for Fighting - The Riddle (Album Version)
- Nik Kershaw - The Riddle
- Alfons/Loafers - The Riddle
- Kodaline - The Riddle
- DArtagnan/Visions of Atlantis - The Riddle
- HYPELEZZ/Erika Miller - The Riddle
- Bassjackers - The Riddle