I was keenly aware that I didn't want to draw on too many typically doomed aspects of the fated singer. Whether it's Judy Garland or Norma Desmond, there is this tragic quality to older women that one can revel in, and you want it to be more three-dimensional than that. So it was important for the character to be strong and resilient, because there are so many victims in opera.

Why be in music, why write songs, if you can't use them to explore life or an idealized vision of life?

I've written songs for Shirley Bassey, Marianne Faithfull, and Linda Thompson. I sort of focus on these wonderful, aging divas. But maybe that's because I think I'm Christina Aguilera.

I definitely was always expected and encouraged to be a songwriter from a very young age, ... But really it's because, as a child, I thought I was Judy Garland. And when I started out, I was a little nuts. I thought I was a classic, legendary superstar when only 10 people knew who I was. I feel in some ways that my confidence is misinterpreted as arrogance, which is understandable. But I've also always thought that false modesty is evil.

Looking back, one of the things I love most about my mom was that she never, ever relented. She stuck to her guns right up until the end. She wasn't abusive, but she was never that thrilled that I was gay.

Once illness strikes, you realize there's not a lot of time for you to do what you really need to do. And there's no time like the present.

I'm a big fan of the Pre-Raphaelites. Millais, Edward Burne-Jones, and I realised recently that my music is Pre-Raphaelite in a certain way, in that it reinvents an older era and romanticises it, puts it in this gilded frame.