"So where does all music come from -- be it hip-hop or rock 'n' roll? I don't know. But I do know that all music is praise. It's praise to the god of your making. Which, in the case of a rock star, might be oneself. Or a woman. Or an idea."
- Bono, 2004
U2 has sold approximately 50.5 million albums in the U.S., according to the RIAA, and upwards of 170 million worldwide.