Lollapalooza 2010 - Day 1 Photos: Lady Gaga, The Strokes, The Black Keys, Hot Chip, Jamie Lidell, Devo, Matt & Kim, Dirty Projectors, The Big Pink, Cymbals Eat Guitars, Semi Precious Weapons, Raphael Saadiq, Drive By Truckers, The Walkmen, The Constellations, Wavves, Foxy Shazam, Javelin, These United States

photos by Randy Cremean and Pooneh Ghana