X Factor judges Cheryl Fernandez-Versini and Mel B are reportedly planning a live duet for the finals later this year.
The performance between the two girl band members had meant to be a surprise, but Louis Walsh has spilled the beans.
There's a shock...
The Irish music mogul revealed the plans at the X Factor press launch in London last week and Cheryl wasn't too happy about him letting the secret slip.
A source told The Sun newspaper today: “Louis has done nothing to help the bitterness between him and Cheryl.”
However speaking at the show's launch, Louis and Cheryl insisted for the media that they were BFFs.
"There's very little we dislike, we disagree on certain things musically and stuff, but we get on really really well," Louis said.
Cheryl agreed: "He's been around a long long time, we all love Louis."
She added: "It's been like I've never been away, like the past four years have evaporated and we're back to square one"
The X Factor continues Saturday and Sunday nights on ITV.
The live shows will begin in October.