One of Summer's hottest music events, Lollapalooza, took place over the weekend in Chicago, pulling in fans from all over the world. While we usually highlight the concert style of various attendees, we decided to flip the switch and focus on the stars on stage. Check out our slideshow to see what musicians, like Ellie Goulding, Lia Ices, Grace Pitter, and Gossip Girl Taylor Momsen wore on and Read more