Paul McCartney, Metallica and more to headline Lollapalooza

Lollapalooza, which is taking place July 31st-August 2nd at Chicago's Grant Park has announced it's massive lineup for 2015. The headliners are Paul McCartney, Metallica, Florence + The Machine, Sam Smith, Bassnectar. Also on the lineup are The Weekend, Alt-J, Alabama Shakes, Of Monsters and Men, Kaskade, Alesso, Tame Impapa, A$AP Rocky, Kid Cudi, Brand New, TV On The Radio, and more! Three day passes for the festival have already sold out, but today a limited amount of single day passes will go on sale at Lollapalooza.com.