When Echosmith first performed at Warped Tour in 2013, they were still a fledgling band few people were familiar with. But thanks in part to playing at the popular summer festival and their infectious hit "Cool Kids," it wasn't long until Echosmith became an international sensation. This year, as they take the stage for the final Warped Tour, things have changed for the trio of siblings. Our host, Ryan J. Downey, sat down with Echosmith's Sydney, Noah and Graham Sierota at day one of Warped Tour 2018 in Pomona, Calif., on June 21 to learn why Warped Tour is important, the positive message behind their latest single, "Over My Head," and their upcoming sophomore album.