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For a live show, it normally goes without a hitch.

But X Factor judges and hosts were left red-faced last night as they tried to get things back on track after appearing to play the wrong footage.

Firstly, audio of finalist Louisa Johnson was played over fellow contestant Che Chesterman's footage.

Then, having clearly noticed, the audio stops and the sounds of a confused audience can be heard as host Caroline was also heard speaking to bosses to try and figure out how to explain what just happened.

Then the footage returns to the Wembley arena with judge and X Factor supremo Simon Cowell holding his arms out in a "What is going on?" gesture.

(Image: ITV)

Caroline and Olly Murs apologise while judges Nick Grimshaw and Cheryl Fernandez-Varsini keep fixed grins and try to look cool.

Caroline said: "We just have to apologise really quick for that, we went to the wrong VT. But here we go, let's look at the evening so far."

Che was voted off the show last night. Tonight, fans will find out who the X Factor 2015 winner will be from Louisa and Reggie and Bollie.