I just think it's better to have ideas. I mean, you can change an idea. Changing a belief is trickier, people die for them, people kill for them.

And I am left behind Corrupted crushed and blind All for a dream That in truth was never really mine.

When I was young, my mother [folk singer Kate McGarrigle] brought home this recording of Verdi's Requiem and we listened to it from top to bottom. By the end of it, I was a completely different person. It was literally a requiem mass for my former self. I was about 12 or 13. The Requiem just totally hooked into what I was going through emotionally - discovering my sexuality right at the time when AIDS was devastating my community and dealing with intense parental situations.

My love of classical hit pretty early. I was 13 when it occurred, and that was really the only music I listened to for many, many years. I went to a conservatory, but I always knew I would be in the pop world, because A) it was more fun and B) you didn't have to practice as much and you could go out more. But I immediately saw this opportunity to inject my material with these sounds that most members of my generation really didn't know about, so it was a great way to differentiate myself from the pack.

Climate change has always been sort of my main focus. I think also with [what happened in Fukushima, Japan] there's still a lot to think about in terms of what's coming down the pike into the world's oceans, too.

I have managed to eke out a good and substantial existence. I'm not shoveling gold bricks or anything, but I do very, very well.

To me, songs come of their own volition - and with an open-ended philosophy.