Listen to My Songs Know What You Did In the Dark (Light Em Up) online. My Songs Know What You Did In the Dark (Light Em Up) is an English language song and is sung by Guitar Tribute Players. My Songs Know What You Did In the Dark (Light Em Up), from the album Acoustic Tribute to Fall Out Boy, was released in the year 2014. The duration of the song is 3:18. Download English songs online from JioSaavn.