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"Tulisa Contostavlos has described the selection of Britney Spears as a judge on The X Factor USA as a &amp;quot;wild card&amp;quot;. The N-Dubz singer told Capital FM that she believes Simon Cowell&amp;#039;s choice to bring Spears onto the reality show competition is a risky move.   The X Factor UK judge explained: &amp;quot;I mean she is [one of the biggest stars] but I think it&amp;#039;s still a wild card because she is, I don&amp;#039;t know, a bit of a rebel.&amp;quot; Spears signed a multi-million dollar deal to join the show after former judges Nicole Scherzinger and Paula Abdul were released from their contracts earlier this year.  There were initially reports of Spears walking off set and being rude to contestants, but both Spears and Cowell dismissed the reports as false.  Contostavlos is currently judging auditions alongside Gary Barlow, Louis Walsh, and new judge Scherzinger for the upcoming season of The X Factor UK. Watch a promo for The X Factor USA&amp;#039;s second season below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/the-x-factor-us/news/a391441/tulisa-contostavlos-britney-spears-is-a-wild-card-for-x-factor-usa/>