Tonight's show (November 18) saw favourites Ella Henderson and James Arthur in the bottom two. Henderson was eliminated after the judges failed to reach a majority verdict and sent the result to Deadlock.
When asked for their decision after Henderson and Arthur performed in this week's sing-off, all of the judges expressed their shock at the result.
Tulisa Contostavlos, mentor of the eliminated Henderson, was obviously angry with the result of the public vote.
She said: "Can I just say this is exactly what I was talking about, when I said people are voting for the wrong people."
She continued to say that the public are "not voting for the person they want to save" and are assuming that their favourite act is safe in the competition.
She voted to send home James Arthur but added: "I should not have had to make that decision tonight, not at all in the slightest."
Nicole Scherzinger described Henderson and Arthur as "two of the most talented acts to grace the stage".
She also revealed that she thought the result was "a great tragedy for the show".
Louis Walsh admitted he was taken aback by the public's decision.
"I'm in shock - I thought these were two finalists," he said.
After Walsh and Contostavlos had sent home Arthur and Scherzinger had voted to send home Ella Henderson, the decision was left with Gary Barlow.
He began by saying that it was time that things got serious on the show and reminded people that it was a singing competition.
He reminded the public: "People at home, we are voting for the best singers."
Barlow also said that the show needed to focus on "vocals" over "staging" as the show enters the quarter-final stage next week.
The X Factor continues next Saturday (November 24) at 8pm on ITV1.
Copyright: Ken McKay/Thames/Rex Features