LINKIN PARK's hybridization of hip-hop grooves and alt angst resulted in pop gold, and the group tested the boundaries of their sound on lesser-known tracks like the twinkling “Not Alone.” They also took their rock theories to other acts: Mike Shinoda's Fort Minor project blended emo's bruised balladry and thoughtful bars, while Chester Bennington's attitude jolted Stone Temple Pilots' glam-grunge.