I Should Have Known Foo Fighters {sot ------------------------------------------------------------------------- {eot Foo Fighters - I Should Have Known from the album Wasting Light (released April 12, 2011) {sot ------------------------------------------------------------------------- {eot A very powerful and emotional song by Grohl/Foo Fighters, I hope you enjoy it! There is some slight variation in the chord Cm, before Bb in the verse. I couldn't quite pick up what it is exactly, let me k (azchords.com)