The N-Dubz star is preparing to release her debut solo album, and will be promoting the record with a performance on the finals later this autumn.
She told The Sun today: “I’m doing a song on the show – it will be a ballad.”
Tulisa's solo career has got off to a mixed start, with her first solo single Young hitting number one back in May.
But her follow up Live It Up, out this week, is currently struggling to crack the Top Ten.
No doubt a performance on The X Factor to millions will help boost sales.
Gary Barlow and Nicole Scherzinger are also both expected to perform on the show, with other guest stars set to include the likes of Xtra Factor presenter Olly Murs and Take That's Robbie Williams.