The ageing British band - who formed in 1962 - begin the US leg of their 18-month A Bigger Bang tour in Boston on Sunday (21AUG05).
Frontman Jagger, 62, insists the gigs will be their best yet, because the band and their music have matured with age.
He says, "We wouldn't tour unless someone said, 'Look, there are a lot of people who want to see you.' If you have creative energy age doesn't matter.
"The Rolling Stones kept their creative forces, maybe because we don't make records every ten minutes.
"When you're young, you tend to be angry a lot. Later, you're able to express diverse emotions. I do draw from my life."
Guitarist Keith Richards adds, "They wonder why we're still here. Well why not? We're a great band. We love to play.
"If there's that many people who love to hear us, what's the beef?"