"Who Knew" is a song by American singer Pink from her fourth studio album, I'm Not Dead. Written by Pink, Max Martin and Lukasz "Dr. Luke" Gottwald, the song was originally released on May 8, 2006, by the LaFace label to radio as the album's... Wikipedia
Composers: Pink, Dr. Luke, and Max Martin
B-side: "Disconnected"
Genre: Pop
Label: LaFace
Producer(s): Max Martin; Dr. Luke
Released: May 8, 2006