X Factor’s Tulisa: There's a beast inside Nicole Scherzinger
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Nonetheless, former N-Dubz singer Tulisa - who's in her second year on the panel of Simon Cowell's singing contest - thinks newbie Nicole, 34, is "lovely".
Tulisa told Cosmopolitan magazine: "There will be no fights between us. We’re complete opposites and she brings out the more sensitive side in me.
"There is a beast inside Nicole, though, if you push her. She would bite your f*cking head off.
"That girl has got so much fire, but - unlike me - she keeps it reserved, whereas I wear my fire on the outside!"
Tulisa's group Little Mix won X Factor last year - but she insists she's not worried about her chances mentoring the girls category this series.
The singer continued: "I know that everyone will assume I want to win again this year - especially after the year I’ve had - but I’m not bothered.
"It’s not about me, it’s about the contestants, and I believe in righteousness. I want the right person to win, whether they are in my category or not.”
The 24-year-old described the release of the X-rated video as the worst thing that's ever happened to her, but now she insists she's over it.
And Tulisa's adamant that she doesn't pine for the attention that comes with being a celebrity.
She continued to Cosmopolitan: “I don’t want the fame; I want the success... There’s always higher to go.
"Once I achieve something, though, I always focus on reaching for the next goal. If you don’t keep stepping up to the next level, then you just stop and think there’s nowhere to go.
"I look around me and there are other artists doing stuff on a bigger scale, and I’ve got to be up there. I should be around the world by now!"
Tulisa's full interview appears in the November issue of Cosmopolitan, on sale now
Exclusive behind-the-scenes footage of Tulisa's cover shoot can be viewed at www.cosmopolitan.co.uk/tulisa