Watch The X Factor tour at The O2 as finalists play their biggest gig yet

x factor 2016 tour backstage - 24

The X Factor live tour hit London's O2 Arena last night for the show's biggest gig to date.

Some 20,000 X Factor fans packed out the iconic London venue over four levels to watch the eight acts on the line up.

Those performing were Louisa Johnson, Lauren Murray, Anton Stephans, Reggie n Bollie, 4th Impact, Che Chesterman and Mason Noise together with wild card Seann Miley Moore.

And for many, including Louisa and Lauren, it was their local venue.

Louisa tweeted before the first of two performances: "Cant believe im performing at the @TheO2 today. Its been my dream ever since i was little. Soooo excited!!!!"

The winner of last year's show surprised the crowd with an extra song to her set list, performing Justin Bieber's Love Yourself which she said was was only for fans at the London dates.

Meanwhile 4th Impact dedicated their performances to the mums in the audience - including their very own - ahead of mother's day.

Today the gang are in Nottingham before continuing to head north over the week to Liverpool, Newcastle and Sheffield before concluding the tour next Saturday in Manchester.

READ MORE: > X Factor tour line up, set list and SPOILERS!

You can buy tickets for The X Factor tour now online from gigs and

Watch highlights of The X Factor's live tour at London's O2 Arena in the video above.

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