I've always been drawn to the four-leaf clover. It's deeply significant to my sister and me, so much so that we both have had it tattooed on the inside of our wrists.

The success of Torn was a bit too much for me. I took a year off and was still scared to start the second album.

It's much easier to write when you're sad. But you can end up isolated and depressed because you almost need to put yourself in that situation to have that angst to write from.

I exercise three to four times a week, doing the Tracy Anderson Method, which involves toning and strengthening our small muscle groups.

I would have been happy to have waited till I was in my mid- to late-30s before I got married, but you don't choose when these things happen, and when they do, there's no doubt in your mind.

I can understand why some people might look at me and say, 'What's she got to be depressed about?' I get that a lot in Britain, where mental health issues seem to be a big taboo.