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Updated: Wed, 25 Jan 2012 23:00:00 GMT | By Colleen Last and Felicity Thistlethwaite
The women in Simon Cowell's life

Simon Cowell and Nicole Scherzinger

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Nicole Scherzinger stepped in as guest judge on X Factor UK when judge Cheryl Cole fell ill, and she impressed Simon so much that he replaced Cheryl with Nicole on the American series!

We bet there isn't much love lost between these two ladies...