To round out the summer festival season, Virgin Mobile FreeFest has revealed it’s star-studded lineup. It will have all types of music from indie to electric, making it a festival not to miss.

The one-day festival, taking place September 21st at Merriweather Post Pavilion in Columbia, MD, will be showcasing heavy hitters such as Vampire Weekend, The Avett Brothers, Robin Thicke and Pretty Lights. It will also have artists such as MGMT, Washed Out, CHVRCHES, Kaskade and Icona Pop.

Tickets to the Festival will be open to the public on August 9th. However if you are a Virgin Mobile customer, a former FreeFest goer or a twitter follower, you are eligible for pre-sale on August 8th. The best thing about this fest? It’s all free! These tickets are available on Ticketfly.

There will be a limited number of FreeFest “Fremium packages” which include guaranteed admission to the festival, a FreeFest T-shirt and a souvenir cup that comes with free fountain drinks throughout the festival.

The Fremium Package will also go towards a good cause. There will be a  $10 charitable donation  made to Virgin Mobile USA’s youth homelessness initiative. Fremium tickets are available via Ticketfly or at the Merriweather Post Pavilion and 9:30 Club box offices.

Check out Virgin Mobile’s website for more info about FreeFest: http://virginmobilefeed.com/freefest/