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Disc1
| 1 | I Begin to Wonder (radio version) | Dannii Minogue | 3:29 |
| 2 | I Begin to Wonder (extended original) | Dannii Minogue | 6:49 |
| 3 | I Begin to Wonder (Krystal K vocal mix) | Dannii Minogue | 8:04 |
| 4 | I Begin to Wonder (DJ Bardot remix) | Dannii Minogue | 7:52 |