An 'X Factor' finalist will be booted off the show tomorrow night.
Simon Cowell wants to give the remaining contestants a "wake-up call" because he is furious with the poor quality of some performances.
The head-judge warned the acts in a 20-minute rant that the one with the lowest number of votes at the end of Saturday's live show will be going home, with another following on Sunday.
"The biggest problem I've got is the sing-offs, which have been horrendous, and there's no excuse,” Simon told the hopefuls, during a crisis meeting on Wednesday.
"Michael Jackson was once asked the three things which make you into a star. And he said, 'rehearse, rehearse, rehearse'. "That's what it's all about. It's not about mucking around with your friends in the house,” he added.
"There are no second chances. This is how important the performance is on Saturday and Sunday. You all need a bit of a wake-up call. You've all got to build up your game and you've got to be the best you've ever been as this is what the music business is like.
"You put out a rubbish record, it doesn't chart. You do a rubbish performance on the night, you're out."
This sat on Xf 1 person will be voted off immediately after only 10 minutes of voting 😱 ...— Cheryl (@CherylOfficial) October 31, 2014
The contestants were said to be "shell-shocked" by the 55-year-old music mogul's outburst and have vowed to work harder.
"Simon was fuming. He cares deeply about this show and if the acts aren't performing, that reflects badly on him,” a source told The Sun newspaper.
"Viewing figures haven't been great recently and Simon is desperate to do something about it.
"It's safe to say the contestants got the message loud and clear.
"They were shell-shocked. Just because they have made the live shows, it does not mean they are superstars. If they get booted off at this stage, they will probably just fade off into total obscurity."
Hopefully the contestants are up to the challenge.