3. Be prepared to leave with a girl crush or five.
There was certainly no shortage of chic frontwomen at Lollapalooza this year, which had us heading home with a serious dose of style inspiration. Emily Haines of Metric's style rivals her amazing vocals—she hit the stage on Friday afternoon in a sequined top, leather shorts, and gold sunglasses that we're still thinking about. On Sunday evening, Florence Welch of Florence + the Machine completely captivated her enormous audience, belting out songs like "Shake It Out" and "Cosmic Love" while bounding across the stage in a flowing Alexander McQueen dress. Many other stylish ladies performed over the course of the weekend, including electronic music rising star Dev, Swedish folk duo First Aid Kit, and Nanna Bryndís Hilmarsdóttir, singer-slash-guitar player from Of Monsters and Men.