| 1 | Someday (I Will Understand)- programming, engineer and mixer:
- Sean McGhee
- assistant engineer:
- Francesco Periangeli
- producer:
- Guy Sigsworth
- assistant mixer:
- Francesco Perlangeli
- other instruments [all other instruments played and sounds made by]:
- Guy Sigsworth
- piano and lead vocals:
- Britney Spears
- guest background vocals:
- Kate Havnevik
- performer:
- Guy Sigsworth
- recorded at:
- Conway Recording Studios in Hollywood, Los Angeles, California, United States and Frou Frou Central in Kensington, Kensington and Chelsea, London, England, United Kingdom
- mixed at:
- Frou Frou Central in Kensington, Kensington and Chelsea, London, England, United Kingdom
- recording of:
- Someday (I Will Understand)
- writer:
- Britney Spears
- publisher:
- Britney Spears Music, Universal Music–Z Songs and Zomba Songs
| 3:40 |
