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.

Tickets went on sale (er, "free") today at noon but with such high web traffic to the page it's nearly impossible to get one at this time. The good news is that you Virgin Mobile's been known to give away extra tickets in the weeks leading up to FreeFest on their Twitter and Facebook pages.

Virgin FreeFest -- 2013 Lineup
City and Colour
MGMT
CHVRCHES
Madeon
Robin Thicke
Ghost Beach
Vampire Weekend
Washed Out
The Avett Brothers
Pretty Lights
Kaskade
Black Joe Lewis
Gareth Emery
Little Green Cars
Manufactured Superstars
Icona Pop
Sky Ferreira
The Knocks
Congorock
TJR