"Rick Rubin has a larger looming presence on this album than his 'thank you' deserves. He asked 'Why can't more people cover U2 songs?' And it's because, with all the great sounds and arrangements, you can forget that there isn't a song there."
- Bono on Rubin's influence on Songs of Innocence
The Popmart concert held in Reggio Emilia (1997, Italy) holds the world record for the concert with the highest paying attendance for one single act without support. There were around 150.000 people.