In only two years, Firefly Music Festival in Dover, Delaware has quickly established itself as a mandatory stop for bands on the U.S. festival circuit. The festival, held this year from June 21 - 23, features headlining spots by Red Hot Chili Peppers, Tom Petty, Vampire Weekend, Yeah Yeah Yeahs and Calvin Harris, among nearly 70 other acts. To prep you for the festival, we compiled songs from every single artist at the fest in one handy playlist. Listen now. Thank us later.