Which song writer do Taylor Swift songs "State of Grace" and "I Knew You Were Trouble" have in common?
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). State of Grace (Taylor Swift song):  The song was written by Swift and produced by Nathan Chapman and Swift. I Knew You Were Trouble: "I Knew You Were Trouble" is a song recorded by American singer-songwriter Taylor Swift for 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.
Taylor Swift