The crowd for Steve Aoki at Lolla 2013. Photo by Jack Edinger. 

Happy fans at Lolla 2013. Photo by Jack Edinger. 

Knife Party performing at Lollapalooza 2013. Photo by Jack Edinger. 

The Lolla 2013 crowd. Photo by Elizabeth Harper. 

Crowd surfing at Vampire Weekend. Lolla 2013. Photo by Cambria Harkey.