Devil Inside是宇多田光以Utada名義發行的第二張英語單曲，也是宇多田光以Utada的名義發行的第一張實體英語單曲，於2004年9月14日發行。Devil Inside一曲取得了美國Billboard舞曲榜周冠軍，而在西方舞廳也常可聽到這首曲子，這單曲算是一成功之作，但並未引起太大的關注以及目光。
| Promo Version |
|---|
|
| 1. | Devil Inside (Original Version) | 3:58 |
| 2. | Devil Inside (Richard Vission Radio Edit) | 3:02 |
| 3. | Devil Inside (The Scumfrog Radio Edit) | 4:03 |
| 4. | Devil Inside (The Scumfrog Mix Show Edit) | |
| 5. | Devil Inside (The Richard Vission Experience) | 7:17 |
| 6. | Devil Inside (The Richard Vission Duberience) | 6:01 |
| 7. | Devil Inside (The Scum Frog Vocal Mix) | 8:02 |
| 8. | Devil Inside (The Scum Frog Dub) | 6:41 |
| CD Version |
|---|
|
| 1. | Devil Inside (Album Version) | 3:58 |
| 2. | Devil Inside (RJD2 Remix) | 4:07 |
| 3. | Devil Inside (Richard Vission Radio Edit) | 3:02 |
| 4. | Devil Inside (The Scumfrog Radio Edit) | 4:03 |
| 5. | Devil Inside (Richard Vission Experience) | 7:17 |
| 6. | Devil Inside (Richard Vission Duberience) | 6:01 |
| 7. | Devil Inside (The Scum Frog Vocal Mix) | 7:14 |
| 8. | Devil Inside (The Scum Frog Dub) | 6:41 |
| Vinyl Version (Side A) |
|---|
|
| 1. | Devil Inside (Richard "Humpty" Vission Vocal Remix) | 8:00 |
| Vinyl Version (Side B) |
|---|
|
| 1. | Devil Inside (The Scum Frog Vocal Mix) | 7:14 |
| Vinyl Version (Side C) |
|---|
|
| 1. | Devil Inside (Original Version) | 3:58 |
| 2. | Devil Inside (RJD2 Remix) | 4:07 |
| 3. | Wonder 'Bout | 3:48 |
| Vinyl Version (Side D) |
|---|
|
| 1. | Devil Inside (Richard "Humpty" Vission Dub) | 6:10 |
| 2. | Devil Inside (The Scum Frog Dub) | 6:41 |