For its 20th Anniversary, the Sonar Music Festival in Barcelona, Spain has tapped Skrillex to headline the event and perform on Friday, June 14th. The dubstep DJ / Producer has broken through the mainstream in the last couple years. He'll be sharing the stage that night with recent Rock and Roll Hall of Fame inductees Kraftwerk, who will be doing a special 3D show. Since all live performances are in three dimensions, we're not exactly sure what that means. Hopefully they'll give everybody cool glasses.