Ageism works in both directions. As a teenager in the public eye, people would talk condescendingly to me. When you get older there's this feeling that you have to start carving up your face and body. Right now I'm in the middle ground - I think women in their thirties are taken seriously.
If I could sell 500 million records every time, it would be great. But I've also had the luxury experience of having it when I was a teenager, in a very kind of model version of it.
Older people say, 'Oh I loved you in 'Sense and Sensibility,'' and that's the only film they want to talk about. Equally, there are people who only want to talk about 'Galaxy Quest.' And there's a whole bunch of teenagers who only want to talk about 'Dogma.'
I cut my teeth playing rock songs on the accordion when I was a teenager and my friends always thought that was extremely amusing. I think that was the genesis of my polka medleys, because every rock song I played on the accordion just sounded like a polka and my friends thought it was funny. So that was a joke that I continue up to this very day.
It's important for celebrities, environmentalists and world leaders to continue to increase education and eco-awareness through the forums provided to them naturally by virtue of being famous. Take inspiration from these words of wisdom from a Nazi-era teenager and concentration camp victim: "how wonderful it is that nobody need wait a single moment before starting to improve the world."