4. A little bit of mud never hurt anyone.
So, by now you've probably heard that Lollapalooza was evacuated for two hours on account of a severe thunderstorm hitting the park on Saturday afternoon—trust us, it was terrifying—but that didn't keep the fans away for long. When the doors opened back up at 5:45 that evening, festival-goers were immediately greeted by the musical performances they'd been promised—and by gigantic puddles of mud. These immediately became dance floors, slip-and-slides, swimming pools... you name it. By the end of the weekend, dirt as an outfit was by far the festival's biggest trend. Haven't you heard? Mud is the new black.