Billie Joe Armstrong Gallery (photo 0051452)

Billie Joe Armstrong and Mike Dirnt of Green Day perform during the 2010 Lollapalooza music festival at Grant Park on August 7, 2010 in Chicago, Illinois. 2010 Lollapalooza - Day 2 Grant Park Chicago, IL United States August 7, 2010 Photo by Kevin Mazur/WireImage.com