"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
U2 was their own opening act a few times under the name of "The Dalton Brothers", they were dressed like a country band an played songs like "Lucille" and "Lost Highway".