I love the fact we're still on the road. I was born to be a factory worker really, so for me the chance to get on stage at Wembley 30 years after we started is amazing.

I've always liked traveling around Europe and seeing the architecture. The buildings in capital cities have been there for hundreds and hundreds and hundreds of years. Some look better than the new ones.

If you don't physically age gracefully, it's a bit sad. I think Steven Tyler can get away anything, because he still looks like he did in '73. Especially from row Z backwards in an arena. As long as the Stones keep their hair and don't get fat they'll get away with the wrinkles.

It's big production. It's huge. It's using studio technology to your benefit. You don't go in and play live and then just take the tapes and get them mastered. You have to create.