Barrett saw herself in the bottom two last night (October 27) against the girlband, who were ultimately eliminated from the competition.
Following the sing-off, Cowell tweeted his followers saying that he would have saved Miss Dynamix over Scherzinger's act Barrett, adding that he did not understand the judges' decision.
Scherzinger addressed the comments on Twitter earlier today (October 28).
I have never had a twitter war, please don't make me start one now @SimonCowell! You R crazy, my girl @HannahBMusic is a STAR...and w/SOUL!!
ā Nicole Scherzinger (@NicoleScherzy) October 28, 2013
The singer previously urged her Twitter followers to vote for Hannah, so that she won't end up in the bottom two again.
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The X Factor returns to ITV next Saturday (November 2) at 8pm, as the contestants take on disco classics.
Nile Rogers and Chic will make a special guest appearance.
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