Someone who knows a thing or two about singing competitions performed on The X Factor UK last night. Kelly Clarkson – who won season one of American Idol , has sold 22 singles around the globe and garnered two Grammys – rocked out with a rendition of “Mr. Know It All,” the lead single off her next album… which hits stores this week! Kelly Clarkson – Mr. Know It All (X Factor UK) Tweeted Clarkson after the performance: “I just had such a fun time on X Factor in London!! Thank you to all of the “Extreme Rhythm” drummers, my band, and the production team! What a fun performance! All of the judges and the contestants I met were so sweet. I wish good luck to all of you! A special shout out to my favorite judge and Texas girl @KellyRowland and contestant @samibrooks.” The artist has given fans an early listen to a number of new tracks over the past week. We’ve collected each one in our Kelly Clarkson video section . Go watch now!

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Kelly Clarkson Has a Blast on The X Factor UK