Radio 1 DJ Nick was absent from the weekend show of The X Factor, in which singing hopefuls completed a second challenge in Boot Camp.
That meant only Simon, Cheryl Fernandez-Versini and Rita Ora saw the contestants perform solo on stage for the second time.
After the challenge, the judges went away in a room to decide who should stay and who should go ahead of the Six Chair Challenge. Although absent, Nick joined in on a video call.
As Simon, Cheryl and Rita began to dissect each performance, Nick gave his opinion too when asked, however, at one point, Simon seemed annoyed with Nick and abruptly cut him off by closing the laptop.
Now, Simon has told The Mirror: "I sent him a text last night [to apologise]. I didn't know they were going to put that in the show. That was quite embarrassing. It was meant as a joke but it didn't quite come across in that way."
The next stage of the competition, which will be shown on the weekend, will see the contestants battle it out for a spot at the Six Chair Challenge.
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