As Stacey Solomon and Shaun Ryder were collecting the Celebrity Chest, the three received instructions of the challenge.
"The basis of a good lie is believability - what's the biggest lie you've ever told, Jenny?" Joly asked.
Eclair replied: "I had a mole removed from my back and when someone asked me how I'd got the scar I pretended that as a small child I was lying naked on a rug in the garden and a snake came along. The gardener shot the snake and the bullet bounced off a wall and went into my back."
Joly laughed, saying: "You don't need a master class from me!"
He suggested: "The moment we spot them I'll bugger off somewhere and Jenny you go lie in bed so it'll just be Kayla and you say, 'You've missed major drama', they'll ask you what happened and you say, 'I don't know, Jenny was telling Dom he should go and get some wood for the fire because it was going out and he just snapped, like he snapped with me'.
"You should say, 'He just lost it and it wasn't about the wood I don't think. He was angry about the letter and I didn't hear what they said but then they were shouting and Dom stormed off'."
Eclair carried on: "I might be nearly crying, I was close to tears but also very angry because I think he's being deliberately obtuse."
Her comedian friend added: "And Jenny, you think I did it for the votes. You're going on about it quite seriously, 'You clearly didn't do it to be nice, you did it because you thought it would play well on camera'."
As Ryder and Solomon returned with the chest, Collins started to recount the fabricated story.
The performers then looked bemused as the 'row' blew up again, as Eclair shouted her accusations of camera-pleasing at Joly, before asking for a cigarette from Ryder.
"Are you sure? Come on my two loved people, you are lovely people, both of you," Ryder said. "You are the grownups here."
Heading to the Bush Telegraph, the Happy Mondays frontman looked upset and recounted the story.
Solomon said: "Dom looks really sad, this is my worst nightmare, I hate rows with people, it was none of my business but it's weird because they were so close."
Later, the trio revealed their challenge and the fake row and received five cup-a-soup sachets, along with the letters from home that Collins and Joly had lost yesterday.