"State of Grace" and "I knew You Were Trouble" were both off of Taylor Swift's "Red" album, which song was written by Swift, Max Martin and Shellback?
State of Grace (Taylor Swift song): "State of Grace" is a song by American singer-songwriter Taylor Swift from her fourth studio album "Red" (2012). I Knew You Were Trouble:  It was written by Swift, Max Martin and Shellback, with the production handled by the latter two.
i don't know