Guns N’ Roses’ headline set at BottleRock Festival was cut off after the band broke the event’s curfew last night (September 4).The festival, which is held in Napa Valley, California, has a strict curfew of 10pm, but the iconic rock band were not done performing when that time came around.As the curfew struck, Guns N’ Roses were performing ‘Paradise City’ with guest star Dave Grohl, whose Foo Fighters will headline the festival tonight.