Fall Out Boy is an American rock band formed in 2001 in Wilmette, Illinois. They rose to fame in the mid-2000s with their unique blend of pop punk and emo influences, particularly with their hit single 'Sugar, We're Goin Down' from the album 'From Under the Cork Tree.' Known for their catchy hooks and introspective lyrics, Fall Out Boy quickly became a staple in the pop-punk scene. The band has experienced several hiatuses but has consistently returned with new music, including albums like 'American Beauty/American Psycho.' Their influence on the genre is undeniable, and they continue to resonate with fans worldwide.