I'm not naturally a person that wants to exercise, but I find running is something I can do wherever I am in the world.

People perceive opera and classical as elitist - I disagree. I've always tried to mix the two, make it more accessible.

I have to believe that I know what's best for me. For instance, I choose all my songs. I never record anything I don't want to record. No one tells me what concerts to do.

I was such a geek in school.

I am a perfectionist.

My idol was Marilyn Monroe, who was a size 16, I think, and curvy in all the right places. I will never be stick thin. I remember a shoot where I had to get into these tiny hot pants, and I thought, 'God, I wish I hadn't eaten.'

I really see myself as a homegirl. Wales is my first home. London is my second home - I've been there 14 years now.