Twenty One Pilots are among the greatest success stories of the 21st century. The numbers don’t lie. Their breakthrough, ‘Blurryface’ (2015), was the first album of the digital era on which all the songs have gone at least gold in the United States. The single ‘Stressed Out’ made the duo the first rock act to achieve more than a billion streams on Spotify. Drummer Josh Dun and keyboard wizard Tyler Joseph are born entertainers. On stage, this means fancy dress, a burning car and backflips off the piano. Anything goes. Twenty One Pilots appeared at Werchter for the first time in 2014, early in the day in KluB C. They return as an undisputed top act, bringing the recently-released ‘Scaled and Icy’ with them.