Fleur, who is in Simon Cowell's Overs category, hits the gym up to five times a week and has even been training Cheryl Fernandez-Versini's girls!
We caught up with the hopeful singer for a quick chat...
Are you feeling sleep deprived yet?
Well, I haven't been sleeping a lot but that's because I'm so excited. I'm sharing a room with Cheryl's girls so we have slumber parties. They all thought I was going to be a mother figure but we've all bonded really well. I'm just like one of them!
You've been on X Factor before...how is it being back?
It's scary, but completely different. I'm on my own this time and I'm a lot older. In my mind I've detached the two experiences. I was on The X Factor nine years ago when I was 16, so it feels so different. This is my chance now.
How have you been staying in shape?
I've been to the gym in the house a lot and I try to work out around four to five days a week. I've been training the other girls too. It's been fun!
Were you worried about the makeovers?
I was worried they would do something to my hair, because it's a part of me and I use it to express myself. But Simon said to me in my first audition: "If this was a competition based on hair, I'd put you through." Perhaps that's why I got to keep it!
Watch Fleur's first live performance here: