"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
Pop is the longest album in U2's discography (and nine seconds longer than one hour exact). With all live tracks included, Rattle And Hum is only longer.