Lollapalooza will be returning for it's 9th year this year, and will be doing something a bit unexpected - they'll be turning the festival into a two-day event. Confirmed mainstage acts thus far include Morrissey, Sonic Youth, Flaming Lips, Modest Mouse, The Polyphonic Spree, and String Cheese Incident. Ticket prices are also claimed to be lower than in years past. More artists and full routing should be announced in the coming weeks.