The 27-year-old stripped off for a new photo shoot ahead of the final, showing she’s completely comfortable in her own skin.
She will compete against Ben Haenow and Andrea Faustini for a life-changing recoding contract and she’s the bookie’s favourite to win.
Last weekend Fleur performed her version of the then-unreleased track from Bruno Mars and Mark Ronson, and the viewers loved it so much that she stormed to the top of the iTunes chart.
But she has since apologised for the chart success the song brought her.
She told BBC’s Newsbeat: “I’m really sorry but all I can say is it’s props to all their creative hard work because it’s an amazing song.
“I don’t know what they were thinking in their minds. I don’t think anyone expected my performance to be as popular as it was.”
And Fleur insisted she didn’t want to get a number one on this week’s official chart, as it wouldn’t be fair to Mark and Bruno.
She continued: “We didn’t expect it to get to Number One on iTunes. That’s crazy like. I think straight away they were like oh wow, what’s happened here?
“So they had to speed up the release date. Obviously because it was their song and they created it, it would only be right that theirs got to number one.”
Who are you backing to win the X Factor on Sunday night?