What's not to love about FreeFest? Returning to the Merriweather Post Pavillion in Columbia, MD for its fifth straight year, this annual festival put on by the good folks over at Virgin Mobile has it all: an eclectic lineup of the year's hottest acts, a charitable foundation focused on ending youth homelessness, and oh yeah –– free tickets. This year's bill skews heavily towards EDM with acts like Madeon, Pretty Lights, Kaskade, Gareth Emery, and more. View the full lineup after the jump.