After increasing ticket demands over the past few years, this summer's Lollapalooza Music Festival has sold out in record time.

Before the lineup was officially announced and even a few days before a photo of the lineup leaked on Twitter, three-day passes immediately sold out. In the past several years, the gap of time between tickets going on sale and selling out usually lasted weeks, even months. In fact, festival organizers didn't even know that Lollapalooza 2008 had sold out until after the festival concluded, which featured such high-profile acts as Radiohead, Rage Against The Machine, and Kanye West. That was the first time in five years that the festival sold out, and the first time a sell-out occurred after the permanent move to Chicago.

On March 26th, the first day of sales, 80,000 three-day passes sold out in roughly three hours. Earlier today, when one-day and VIP passes went on sale, they were gone even faster, taking only one hour. The developments took place despite the organizers expanding the parameters of the event to 100,000 attendees per day – the largest in festival history.

The Cure, Mumford & Sons, Nine Inch Nails, The Killers, Phoenix, Queens Of The Stonage, The Postal Service, and Vampire Weekend are among the many notable acts set perform at this year's festival, which takes place August 2-4 in Chicago's Grant Park.