Firefly Music Festival announced the addition of Paul McCartney to the 2015 lineup. It is McCartney’s first ever appearance in Delaware and the latest confirmed date of this year’s Out There tour. Firefly Music Festival takes place June 18-21 at The Woodlands of Dover, Delaware. In addition to Paul McCartney, artists heading to The Woodlands the weekend of June 18-21 include Kings of Leon, The Killers, Morrissey, Snoop Dogg, Foster the People, Bastille, Modest Mouse, Zedd, Hozier, Empire of the Sun, Kid Cudi and nearly 100 additional acts performing across seven stages.