| 1 | Who Knew- recording engineer:
- Lasse Mårtén (in 2006), Francesco Perlangeli (in 2006) and Josh Wilbur (in 2006)
- drums (drum set) programming:
- Łukasz Gottwald (in 2006) and Max Martin (in 2006)
- assistant engineer:
- Tim Roberts (task: engineered for mix)
- engineer:
- John Hanes (task: engineered for mix)
- producer:
- Dr. Luke and Max Martin
- mixer:
- Serban Ghenea
- drums (drum set):
- Lasse Mårtén (in 2006)
- guitar:
- Łukasz Gottwald (in 2006) and Max Martin (in 2006)
- orchestra:
- Leon Pendarvis (in 2006)
- orchestrator:
- Leon Pendarvis
- phonographic copyright (℗) by:
- RCA Records (in 2006)
- recorded at:
- Conway Recording Studios in Hollywood, Los Angeles, California, United States (in 2006) and Decibel Studios in Stockholm, Stockholms län , Sweden (in 2006)
- mixed at:
- MixStar Studios in Virginia Beach, Virginia, United States
- music videos:
- Who Knew (music video) by P!nk
- recording of:
- Who Knew (in 2006)
- lyricist and composer:
- Alecia Moore , Łukasz Gottwald and Martin Sandberg
- publisher:
- EMI Blackwood Music Inc., Kasz Money Publishing , Kobalt Songs Music Publishing and P!nk Inside Publishing
| 3.55 | 3:30 |
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