I'm going to build an empire. I'm always writing for someone else. I want to be someone who has her fingerprints all over the pop charts.

I'm not good at being a picture-perfect pop star, happy all the time. If I'm having a bad day, I can't pretend. I'm always a bit unhappy, but that's just me. I like dwelling in my sadness.

Happiness cries when the tears are dreaming

To be honest, for me, my main workout is when I'm on stage. Even though I make pop music, I don't think I perform in the classic 'pop star' sort of way. I'm very active on stage; I always end up dripping in sweat afterwards. It's always like a full-on, wild performance, so that's pretty much like my exercise, I would say.

Obviously, getting a number in the charts is a nice thing but the cherry on the cake rather than the main cake.

I always love wearing Vivienne Westwood. Her dresses just seem to fit me perfectly, and she makes dresses for girls with curves - I love that.