"Who Knew" is a song by American singer #Pink from her fourth #studioAlbum, I'm Not Dead (2006). Written by Pink, #MaxMartin and Lukasz "#DrLuke" Gottwald, the song was originally released on May 8, 2006, by the #LaFace label to #radio as the album's second #single, but was only a moderate success. After the success of "U + Ur Hand", the song was later successfully re-released in June 2007 as the album's fourth single in the United States. Musically.
https://youtu.be/_FJzj1ueJoM