Stereogum armed 23 bands with Polaroid Cameras and Impossible film at Lollapalooza's twentieth anniversary over last weekend. There was performances from big headliners such as Eminem, Foo Fighters, Coldplay and Muse. But it was the supporting bands that were the interest for some instant film fun! Black Lips, Arctic Mondays, Noah And The Whale were among the bands that contributed snaps on how they passed their time in Grant Park. Especially loving GroupLove's cartoon decorated snaps! Click here to see the final product!