Fall Out Boy - My Songs Know What You Did In The Dark (Light Em Up) Ft. 2 Chainz By Author Free Britney at Feb 05, 2013 • Category 2 Chainz Fall Out Boy’s new single “My Songs Know What You Did In The Dark (Light Em Up)” ft. 2 Chainz. https://www.youtube.com/watch?v=HsfY8iFbYjE