| recordings |
|---|
| Key to My Heart (Airwaze radio edit) | | Hardcharger vs. Aurora & Toxic | 3:36 |
| Key to My Heart (Airwaze remix) | | Hardcharger vs. Aurora & Toxic | 6:58 |
| Key to My Heart (extended mix) | | Hardcharger vs. Aurora & Toxic | 5:30 |
| Key to My Heart (Imprezive meets Pink Planet radio edit) | | Hardcharger vs. Aurora & Toxic | 3:59 |
| Key to My Heart (Imprezive meets Pink Planet remix) | | Hardcharger vs. Aurora & Toxic | 5:34 |
| Key to My Heart (Matt Pincer instrumental radio edit) | | Hardcharger vs. Aurora & Toxic | 3:39 |
| Key to My Heart (Matt Pincer instrumental remix) | | Hardcharger vs. Aurora & Toxic | 8:00 |
| Key to My Heart (Matt Pincer radio edit) | | Hardcharger vs. Aurora & Toxic | 3:39 |
| Key to My Heart (Matt Pincer remix) | | Hardcharger vs. Aurora & Toxic | 8:00 |
| Key to My Heart (Phillerz radio edit) | | Hardcharger vs. Aurora & Toxic | 3:21 |
| Key to My Heart (Phillerz remix) | | Hardcharger vs. Aurora & Toxic | 4:57 |
| Key to My Heart (radio edit) | | Hardcharger vs. Aurora & Toxic | 3:43 |
