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James Hibberd
November 21, 2011 AT 03:01 PM EST

Kelly Clarkson is making the leap: The singer whose TV career is synonymous with American Idol is reuniting with her former judge Simon Cowell on Fox’s The X Factor.

Clarkson, along with Grammy-winner Bruno Mars, will perform on X Factor‘s results show on a special night — Wednesday, Nov. 23 at 8 p.m. Finalists will face a double elimination on the live show leaving only seven acts left in the competition. Clarkson plans to sing “What Doesn’t Kill You (Stronger)” and Mars will perform “It Will Rain.” This week’s theme: “Giving Thanks.”

Since winning the first season of Idol in 2002, Clarkson has returned periodically to Fox, most recently last April during Idol season 10. Her most recent album “Stronger” debuted at No. 2 on the Billboard Top 200.

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