CHICAGO, IL - JULY 31: Paul McCartney performs during Day One of Lollapalooza at Grant Park on July 31, 2015 in Chicago, Illinois. (Photo by Timothy Hiatt/WireImage)
CHICAGO, IL - JULY 31: Paul McCartney performs during Day One of Lollapalooza at Grant Park on July 31, 2015 in Chicago, Illinois. (Photo by Timothy Hiatt/WireImage)