It's been a meteoric rise for these middle school pals, blasting from obscurity to Warped Tour headliners in just over three years. Aided by their catchy pop-punk sound and incessant social networking, the quartet built a legion of young fans -- and hit their stride with their sophomore album, 2009's Smile Kid. The band's already confirmed for every date of Warped Tour 2010, and are currently headlining the Sub City Take Action Tour.