Newsround: What's coming up next for you?
Sarah: My debut single - When I Lost You comes out on 9 September, then my second single will come out shortly after that, with my first album due at the end of the year. It's a fairly diverse album and it shows a bit of me and my personality. I'm hoping it'll be liked by lots of people and appeal to all ages.
Newsround: How do you style yourself?
Sarah: I've always been into my clothes and had my own sort of image. I just wear what I feel comfy in.
Newsround: What's it like having a stylist?
Sarah: It's fun really. You've got to have someone helping you out because you're thinking about so much that it's nice to have someone to back you up with fashion choices.
Newsround: What's been the highlight of the last six months?
Sarah: Everything's been like a dream come true for me. I've always wanted to be a performer and since I was 15 I've educated myself in the performing arts. When I was 15 I decided I wanted a record deal and started writing. I went to loads of auditions and got loads of knock-backs, so now I'm here I'm just going to develop it and make as much of it as I can.
Newsround: What were you doing before you became a pop star?
Sarah: I took a year out after college having studied performing arts. Then I worked to save money so I could live in London because that's where all the auditions are. I had three jobs - waitress, bar person and pa /clerical assistant. Doing those jobs made me who am today and it makes me appreciate what I have a lot more.
Newsround: Do you think the stardom will ever go to your head?
Sarah: I think I've been brought up well and am very old fashioned and polite. Sometimes I can be a little bit too nice, but I'm still the same person and hopefully the fame won't affect me in a negative way. I still see my family and friends and I think that keeps me nicely grounded. I can't take anything for granted. At the end of the day it could be taken away as quick as it's been given to me, so whatever comes is a bonus.