Here we go again... 999 XTC (@thereal999xtc) Tweeted: Huge news! Green Day will be performing at the 2019 @iHeartRadio Music Festival! Buy your #iHeartFestival tickets RIGHT NOW: https://t.co/2N3JPABGTv https://twitter.com/thereal999xtc/status/1171905164808081408?s=17