Fall Out Boy - My Songs Know What You Did In The Dark (Light Em Up) - Single

"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, released as the lead single for their fifth studio album, Save Rock and Roll.[2] It serves as the band's first single following their three-year hiatus and regrouping in early 2013.[3] The track and its music video were released on February 4, 2013 worldwide and February 5, 2013 in North America, to coincide with the official news of the band's reformation.[4] The band felt that the song best represented their album at its core.

The lyric which the song's title is taken from originates from an unrelated 2004 demo by the band.[5][6] Fall Out Boy performed "My Songs Know What You Did in the Dark (Light Em Up)" on Jimmy Kimmel Live! for their first post-hiatus TV performance on February 13 as well as on various TV shows throughout the entire year, and have extensively played it in acoustic version at radio interviews. Frontman Patrick Stump performed the song as a guest on Taylor Swift's Red Tour on July 13, 2013, and Swift guested in turn on Victoria's Secret Fashion Show on November 13, 2013.

The music video is part 1 of The Young Blood Chronicles, an ongoing series in which a video will be recorded for every song on Save Rock and Roll as part of a narrative. "My Songs Know What You Did in the Dark (Light Em Up)" was a comeback success, reaching the 2 million digital downloads mark in July 2013, being the fourth song by Fall Out Boy to do so, and was certified 3x Platinum by the end of the year. It was named by BBC Radio 1 as one of the "Top 100 Tracks of the Past 5 Years"[7] and No. 1 on Sirius XM Hits 1's best of 2013 countdown.[8] It reached the top 10 on both Pop Songs and Alternative Songs, and peaked at No. 13 on the Billboard Hot 100.