Conversation so far:
What album did Fall Out Boy release in 2001?
What occurred in 2001 with the band Fall Out Boy?
Fall Out Boy was formed in 2001 in the Chicago suburb of Wilmette, Illinois by friends Pete Wentz and Joe Trohman.
What album did Fall Out Boy release?
In 2002, Fall Out Boy released an EP called Fall Out Boy/Project Rocket Split EP.
Did the EP Fall Out Boy/Project Rocket Split EP perform well?
The  Fall Out Boy/Project Rocket Split EP has sold 25,000 copies in the United States as of August 2008, according to Billboard.
Did Fall Out Boy tour during 2002?
What song by Fall Out Boy was a hit on the charts?
Fall Out Boy's 2005 major-label breakthrough, From Under the Cork Tree, produced two hit singles, Sugar, We're Goin Down and Dance, Dance.

Question: Who wrote their songs?
Self-contained rewrite: Who wrote Fall Out Boy's songs?