Initially a Blink-182 cover band, Panic! At the Disco went from high-school kids to emo-pop heroes within a matter of months after being discovered by Fall Out Boy's Pete Wentz in the mid-'00s. Their debut album, A Fever You Can't Sweat Out, first introduced the world to the Las Vegas teens' theatrical take on punk-pop, which featured dense lyrical runs and violin arrangements. Embracing psychedelic pop for 2008's Pretty. Odd., the band eventually downsized to a duo, changing directions again for the New Wave sound of 2011's Vices & Virtues.