Watch Online Free on Watchseries. Twenty One Pilots headlined Firefly Music Festival in Dover, Delaware in 2017. The band performed on Friday, June 16th, and delivered a high-energy set, with highlights including Josh Dun crowd surfing on his drum kit and Tyler Joseph crowd surfing while standing. They played a mix of songs from their albums Blurryface and Vessel, including "Heavydirtysoul", "Stressed Out", and "Trees", as well as covers like "Tubthumping" and "Jump Around" with Judah & The Lion. The performance was described as captivating and dynamic, with the two-piece band creating a "stadium-filling fury".