Serious
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Disc1
| 1 | Serious (extended single mix) | Fracus & Jack In Box | 4:31 |
| 2 | Serious (radio edit) | Fracus & Jack In Box | 2:44 |
| 1 | Serious (extended single mix) | Fracus & Jack In Box | 4:31 |
| 2 | Serious (radio edit) | Fracus & Jack In Box | 2:44 |