Fall Out Boy - My Songs Know What You Did In The Dark from their new album Save Rock and Roll Hope you enjoy :-) I do not own the song or the music 2013. My Songs Know What You Did In The Dark (light Em' Up) is track 2 on the album Save Rock And Roll. It was written by Wentz, Peter / Stump, Patrick / Trohman. My songs know what you did in the dark could reference songs like My Heart is the Worst Kind of Weapon, Tell That Mick. , Get Busy Living or. (My songs know what you did in the dark) So light 'em up, up, up Light. Chicago X Softcore Songs, I Eat Publishing For Breakfast, Sony/ATV Songs LLC, Emi April. My Songs Know What You Did in the Dark (Light Em Up) is a song written and recorded by American rock band Fall Out Boy. Lyrics to 'My Songs Know What You Did In The Dark' by Fall Out Boy. Ooh oh oh oh. 12 Hit Songs You Won't Believe Were Passed Up By Other Artists SUBSCRIBE TO FOB: Listen to the new single Centuries and download it on iTunes . View the Fall Out Boy My Songs Know What You Did In The Dark lyrics and music video. My Songs Know What You Did In The Dark (Light Em Up) Fall Out Boy. From the Album Save Rock And Roll. April 16, 2013 | Format: MP3 103 customer reviews $0.00 Fall Out Boy My Songs Know What You Did In the Dark (Light Em Up) lyrics: Oh, whoa, oh, oh, whoa, oh, oh, whoa, oh, oh, whoa. Oh, whoa, oh, oh, whoa, oh, oh.