After announcing which acts are going to play at the festival, now Lollapalooza fans know when their favorite artists are going to play this summer.On Tuesday, the organizers announced the day-by-day lineup for the event in Grant Park from August 3-6. This announcement comes as single-day and two-day tickets go on sale on Wednesday at Noon central time. Prices for one day start at $125 with the two-day passes starting at $250. Full festival passes have already been on sale and start at $365.