A hard-hitting, multi-platinum-selling heavy metal outfit based out of Chicago, Illinois, Disturbed emerged in the late '90s with an aggressive blend of hard rock and alternative and nu metal. Fortified by a distinct melodic complexity and the uncompromising swagger of frontman David Draiman, the band exploded onto the scene in 2000 with The Sickness, which peaked at number 29 on the Billboard 200, and was eventually certified five-times platinum. They broke huge in 2002 with their sophomore effort, Believe, which, like all four of their subsequent offerings, debuted at number one. Disturbed went into a four-year hiatus in 2011 to focus on various side projects, but returned in 2015 with the chart-topping Immortalized, confirming their status as one of the genre's most commercially successful acts.