Fall Out Boy changed the face of pop-punk forever—and it all started as a side project. In 2001, suburban Chicago hardcore scenesters Pete Wentz (bassist) and Joe Trohman (guitarist) came together to start a new band, soon joining forces with vocalist Patrick Stump and drummer Andy Hurley. They got to work fast, putting together a self-titled demo and jumping on every show they could book. This DIY ambition eventually paid off, and would continue to dictate much of their career—including the creation of Stump and Wentz’s indie label Decaydance Records (now called DCD2)—even after they inked a major-label deal and blew up the charts with 2005’s <I>From Under the Cork Tree</I>. Hit singles like “Sugar, We’re Goin Down” and “Thnks Fr Th Mmrs” from 2007’s <I>Infinity on High</I> wriggle with hyper punk riffs and lyricist Wentz’s verbose witticisms, delivered by Stump in sharp but soulful wails. While those qualities have continued to permeate Fall Out Boy’s work, it’s their keen pop instincts and omnivorous tastes that have led them to collaborate with a melange of rap superstars (Pharrell Williams, Lil Wayne, Migos, Lil Peep); throw around references to Pete Rose, Uma Thurman and Britney Spears; sneak in sounds from Russian composers, Suzanne Vega and Motley Crue; and break down every musical barrier possible by incorporating elements of glam-metal, hip-hop, dubstep, funk, soul, reggae and EDM. In doing so, they’ve not only paved the way for other genre-subverting heroes like twenty one pilots, they’ve also given a platform to DCD2 signees such as Panic! At the Disco, pop-punk revolutionaries in their own right.