Tulisa Contostavlos isn’t scared of Simon Cowell.

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The N-Dubz star was hired by the music mogul as one of the new X Factor judges but instead of being intimated by her powerful boss, Tulisa likes to wind him up.

The 23-year-old star – who is joined on the judging panel of the show by Gary Barlow, Kelly Rowland and Louis Walsh – said: “He doesn’t scare me at all! I can see why people are scared of him because he’s so powerful, but we just banter.

“He was winding us up trying to start arguments between me and Kelly and I said, ‘You cheeky one, you, stop chatting rubbish!’ ”

Tulisa says she’s loving every minute of being on the X Factor and insists she and former Destiny’s Child singer Kelly get on really well, despite people trying to make out there is a rivalry between them.

In an interview with the new issue of Company magazine out on 10 September, she said: “It was funny when I met her because I was a big Destiny’s Child fan, but it took a while for me and Kelly to warm to each other because we didn’t have time to have a proper sit-down.

“But she cracks me up and everyone’s upset we’re not warring. I’m a hard person to argue with – you have to really piss me off if you want that out of me!”