Of course I have an ego, but you have to have an ego. You have to be incredibly competitive. I can get competitive at times, way too much, and it becomes a little bit obsessive.

I think the best singers in the world, historically, are American. Britain's got its fair share, as well, but some of the greatest singers, ever, whether you're talking about Whitney Houston or Mariah Carey or Aretha Franklin, are from the legacy here.

The minute you start assuming that the audience is very happy to see the same show again, you're dead.

I don't have sophisticated tastes. I have average tastes. If you looked in my collection of DVDs, you'd see 'Jaws' and 'Star Wars.' In the book library, you'd see John Grisham and Sidney Sheldon. And if you look in my fridge, it's, like, children's food - chips, milkshakes, yogurt.

I genuinely believed no one would want to marry me. I am difficult to live with. I'm selfish, quite weird and I need time on my own to think - and then I work all night long. That is difficult for someone to deal with. And it would drive me mad - I could never be my own girlfriend!

The artists who endure are the ones who stay focused even after they have reached the top of their profession.

They understand what their market is and who they should be selling records to, and most importantly, they know the kind of artist that they want to be, but they have to do it themselves. You don't want a 13-year-old singing some awful song from a musical.