"It's never been done, oddly enough. Two bands like this, two bands having a baby and we're not the chick."
- Bono, 2006, on the duet with Green Day
did you know
The Popmart stage design, which looked like a supermarket, appealed to Bono as a supermarket, with its myriad choices and temptations, could function as a metaphor for U2's songs, as they often deal with the struggle between desire and faith.