That's what all art's about - a sense of moving away from boundaries that you can't in real life. Like a dancer is always trying to fly, really - to do something that's just not possible. But you try to do as much as you can within those physical boundaries.

I do have the odd dream where I'm on stage and I've completely forgotten what I'm meant to be performing - so they are more nightmares than dreams.

But I don't have a very good track record with royalty. My dress fell off in front of Prince Charles at the Prince's Trust, so I'm just living up to my reputation.

If you believe in what you do and you really want to be in music, just stick at it. It's always a learning process. Enjoy it because I think making music is a privilege, really. In an ideal world, it should also always be fun. As much as possible, make it fun.

I had an incredibly full life with my imagination: I used to have all sorts of trolls and things; I had a wonderful world around my toys and invented people. I don't mean I had imaginary friends; I just had this big imagination thing going on. I didn't need any imaginary friends, because I had so much other stuff going on.