The lineup for the 2011 Virgin Mobile FreeFest has been revealed. Taking place Sept. 10 at Merriweather Post Pavilion in Columbia, Maryland, the free-admission festival will feature the likes of TV On The Radio (pictured), the Black Keys, Deadmau5, Patti Smith, James Murphy (formerly of LCD Soundsystem), Cee Lo Green, !!!, Big Sean and many more. You can get details on how to get your own free tickets here and you can scope the full lineup below.

THE BLACK KEYS

DEADMAU5

TV ON THE RADIO

CEE LO GREEN

JAMES MURPHY

CUT COPY

BIG SEAN

PATTI SMITH

OKKERVIL RIVER

EMPIRE OF THE SUN

CALVIN HARRIS

!!!

GHOSTLAND OBSERVATORY

GRACE POTTER AND THE NOCTURNALS

PORTER ROBINSON

TWO DOOR CINEMA CLUB

ECLECTIC METHOD

BOMBAY BICYCLE CLUB

ALBERTA CROSS

TEDDYBEARS