Rowland -- who judged The X Factor's U.K. edition in 2011 -- and Rubio will be replacing two-time judge L.A. Reid and second-season judge Britney Spears on the reality singing competition's upcoming panel.
Reid announced in December he won't be returning to The X Factor after serving on the panel for two seasons, while Spears confirmed in January she had "made the very difficult decision" not to take on another edition of the series. According to reports, both parties opted to quit the show before Fox could fire them.
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