I should add I've seen the last three bands at this festival, myself this year. I saw a Rise Against headline show in September, I saw Bush open for Nickelback in May, and I saw Silversun Pickups open for Foo Fighters in June.
Imagine Dragons (March 13)
Bastille (March 31)
Cage The Elephant/Foals (May 14)
Seether (May 18)
Linkin Park/30 Seconds To Mars (August 29)