The public mistakes I’ve made. Most recently, I tried to light an e-cigarette on an aeroplane and was told to put it out. I completely forgot I was on a plane. I’d had, like, three drinks, but it only takes three. I stopped as soon as I got off and I got straight back into my programme, because that’s what I do.

I would definitely change the way one or two relationships ended.

Getting my tongue pierced aged 15, when I had train-track braces on both my top and bottom teeth. Huge error.

My mentally ill brother going to juvenile hall when he was 14. It led to his incarceration from 14 to almost 40.

To just chill out and not worry. Growing up, I worried about every little thing. I was like, "oh I'm not good enough, I'm not confident enough, I'm not pretty enough, I'm not this and that." I would cry about my appearance, and cry about a bunch of things that don't matter to me now. I would just say, the stuff that matters now won’t matter in a few years, and just chill out and enjoy your life.

Yes, for a lot of my life actually. It’s always been something I’ve struggled with, even now. My relationship with sleep and nighttime has affected me in so many ways, in more ways than I knew. So, I decided to write about it.

I started going to therapy, which has been really helpful just to get it out. Of course for me as a songwriter, writing helps.

When I walk into rooms to write, I just try to make it about enjoying it and having fun rather than thinking about it too hard… But I think it's fun and so much more rewarding when you go in with no plan and just follow your gut and it works.

Amy Winehouse. I love everything about her and her music. It was honest and so wise in a way. I hope to emulate the way she captivated people. Someone like Ed Sheeran, too, because he can also leave an audience in awe with no help. That’s something to admire.

That's always been a tough thing. I've always struggled with staying present and not worrying too much about the future or the past. I'm always either dwelling on the past, or missing the past, or worrying about the future. So that's been a big challenge, because this type of lifestyle goes extremely fast.