Over the last 11 series, the 'X Factor' live stage has played host to a whopping 1,123 performances (yes, we've counted them) as 142 finalists have battled it out to be crowned show champions.
And among that huge number have been a handful of real gems, thanks to contestants such as Little Mix, Leona Lewis, Alexandra Burke, Fleur East, One Direction, Olly Murs and Ella Henderson putting on a real show.
So to celebrate the new series of 'The X Factor', we have conducted some very scientific research (aka a straw poll in the HuffPost UK office) to compile the 20 greatest performances of all time. Will your favourite be number one? Scroll through the gallery below to find out...
MORE 'X FACTOR':
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- 20 Of The X Factor's Most Hilarious Moments
- The Definitive Ranking Of X Factor's Greatest Ever Performances
- Which ‘X Factor' Judge Are You?
- What Happened To The Contestants Of 'X Factor' Past?
- How Many Past 'X Factor' Finalists Do You Recognise Now?