It's the One Direction anniversary, and ten years since the boys first took the X factor stage by storm. But which of their performances were the best? Here's a definitive ranking.

Alex & Sierra, Jeffrey Gutt and Carlito Olivero perform for the last time on the Wednesday, December 18 performance finale of The X Factor, recapped by Daniel Fienberg.

HitFix’s Daniel Fienberg recaps the Wednesday, December 12 episode of The X Factor. Emblem 3, Carly Rose Sonenclar, Tate Stevens and Fifth Harmony perform.

One Direction gave Us some pretty memorable performances during their time on The X Factor UK. After auditioning as solo artists, Harry Styles, Liam Payne, Louis Tomlinson, Zayn Malik and Niall ...

Fleur East's 2014 performance on The X Factor of Bruno Mars and Mark Ronson's Uptown Funk was so impressive, she changed the music industry.

‘X Factor’s’ Final 4 On Their Semifinal Performances A relieved Chris Rene, Melanie Amaro, Josh Krajcik and Marcus Canty ran down their top 4 performances after Wednesday's show.

Not just one of the best ever Halloween Week performances, but one of the best ever X Factor performances. EVER. This is the moment when Little Mix made us stop and pay attention - not only ...

So to celebrate ‘The X Factor’ going live, 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.

One Direction gave Us some pretty memorable performances during their time on The X Factor UK. After auditioning as solo artists, Harry Styles, Liam Payne, Louis Tomlinson, Zayn Malik and Niall ...

We’ve seen incredible talent in the audition room and, of course, some not-so-incredible talent. Here are just some of the best X Factor auditions of all time.

‘X Factor’ Finale Performances: Melanie Flies, Chris Gets ‘Complicated,’ Josh Goes Acoustic The final three take on superstar duets and then remind us where they came from in their last ...