5. Dress for a mess.
We know, we know—street style stalking is one of our favorite parts of going to any music festival, too. But unlike, say, Coachella, we noticed that function took precedence over fashion at Lollapalooza. Cut-offs and sports bras far outnumbered the bohemian dresses that we expected, but that's probably for the best. We wouldn't suggest wearing anything that you'd be upset if you got knocked into the mud pit while dancing at the Perry's stage.