The Chainsmokers, 5 Seconds of Summer, Lennon Stella
Recommended
The Chainsmokers make sense as a festival headliner due to their overblown, triumphantly loud type of EDM perfectly curated for giant arenas and outdoor partying. Remember to stay hydrated since you'll be dancing to this set all night, not to mention those of openers Australian pop-rockers 5 Seconds of Summer and Canadian export Lennon Stella.