<P> `` My Songs Know What You Did in the Dark ( Light Em Up ) '' is a song by American rock band Fall Out Boy , released as the lead single for the band 's fifth studio album , Save Rock and Roll . It serves as the band 's first single following the group 's three - year hiatus and regrouping in early 2013 . 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 . The song impacted radio on February 19 , 2013 . The band members felt that the song best represented their album at its core . </P>
<P> `` My Songs Know What You Did in the Dark ( Light Em Up ) '' is a song by American rock band Fall Out Boy , released as the lead single for the band 's fifth studio album , Save Rock and Roll . It serves as the band 's first single following the group 's three - year hiatus and regrouping in early 2013 . 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 . The song impacted radio on February 19 , 2013 . The band members felt that the song best represented their album at its core . </P>
who sings light it up i 'm on fire
who sings light it up i 'm on fire
Fall Out Boy
Fall Out Boy