WATCH: Britney Spears Brings the Mean in 'X Factor' Preview

A new TV spot offers the first glimpse of the pop star as a singing judge -- and she seems to be a chip off the old Simon Cowell

Britney Spears knows how hard it is to be a successful pop star -- and, from the looks of it, she's not going to blow sunshine up the butts of the contestants she judges on The X Factor.

The 30-year-old "Hold It Against Me" singer hasn't quite reached Simon Cowell levels of nastiness yet, but a new promo for the show's second season proves that Brit's got some serious bite. In the video, Spears shows that she has perfected her pained wince and her delivery of the line, "You definitely don't have the X Factor." Watch below!

Although she lands on the critical side of the judging spectrum (or, at least, does so in this clip), we doubt that Spears only has negative thinks to say to X Factor contestants. She recently told Access Hollywood that she's a "fair judge."

"I don't think I'm the toughest judge at all. I definitely think Simon would have to be the toughest judge," she said in the interview. "Sometimes it's kind of hard because I know what [the contestants have] been through and being so young and achieving their dreams and stuf... So you just have to use constructive criticism and be there for them and just show them support."

Reports of Spears' sometimes sweet, sometimes harsh judging style have been making news since X Factor auditions started in late May. The star reportedly stormed off the set on her first day after one contestant butchered her single "Hold It Against Me" -- but she later clarified that she was "just taking a little break." Spears also got emotional when a singer she'd once done a duet with showed up to audition -- and to reveal to her that he's gay. And, on Tuesday, Spears walked off the set when a man dressed in drag performed her hit "(You Drive Me) Crazy." Britney later returned to tell the singer, "I really respect the tribute. It was really nice."

The new season of The X Factor premieres Wednesday, Sept. 12, on FOX.

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