The 2015 Lollapalooza lineup is here! Set to take place at Grant Park in Chicago the weekend of July 31 through August 2, the three-day fest boasts headliners Paul McCartney, Metallica and Florence + the Machine.
Eminem surprised Lollapalooza attendees on Friday, Aug. 1, when Rihanna appeared on stage and joined him for three songs: 'Love the Way You Lie,' 'The Monster' and 'Stan.'