Tonight is my Halloween show at the Kia Forum in LA, or the Harryween show, as I've named it. There's an electric energy tonight that you can feel all the way backstage. I'm all dressed up in my Danny Zuko costume when I hear a knock at my door

You open the door and you're in your Sandy Olsson costume, you look so beautiful. Your music career has really taken off this year and I invited you to come onstage to perform The One That I Want with me

"Hello, love. Are you ready for tonight?"

I say, running a hand through my wig, it feels strange but I'll get used to it