It's weird to think that Firefly is in its fifth year now. What began as one of the many competitors to the big three on the music festival circuit -- Bonnaroo, Lollapalooza, and Coachella -- has positioned itself as another premiere, event festival destination for folks in the American northeast. The Delaware festival has announced it's lineup already -- a smart move considering Bonnaroo's predilection for releasing their line-up in the early Spring and the fact that the festivals are generally only a weekend apart from one another -- and it looks pretty dope. Some quick and obvious highlights include Mumford & Sons, M83, Chvrches, the 1975, Florence + the Machine, Tame Impala, Disclosure, and many, many more. If you don't feel like hauling ass to Tennessee, Chicago, or California, it's clear that Firefly is no longer a second rate member of the festival circuit. Check out the full line up below.