iHeart is a festival. They have two nights of performers inside AND outside the arena.
Axver has their first U.S. festival performance being the 1983 US Festival and Glastonbury as their overall last festival appearance.
Someone is going to have to explain to me how the iHeartMusic festival is somehow disqualified from consideration. Is it the arena setting? Is it somehow more geared as an industry event than a legitimate festival?
iHeartRadio in 2015... everyone seems to have forgotten that?
This, to be perfectly honest, is the answer:
Though it was 2016.