Celebrity Big Brother 2014 launches tonight on Channel 5 and there could be in for some tense reunions between the (rumoured) housemates.
Both Lee Ryan and Jim Davidson previously appeared together on Hell's Kitchen, with the pair getting into a nasty row on the ITV series.
Boy band star Lee clashed after he failed to follow orders from comedian Jim, who had been appointed team leader.
"Everyone agrees, and then you said no, what’s the matter with you man?" Lee snapped at Jim.
Jim replied: "What’s the matter with me, I thought I was the captain but obviously I’m not."
Lee retorted that Jim had let his captaincy go "up [his] arse", before leaving the show.
Blue singer Lee also has a past with fellow rumoured Celebrity Big Bro housemate Dappy after the N-Dubz star PUNCHED him.
“Dappy’s fiery. He’s young. We were playing a charity football match and I was marking him. Because I’m bigger than him, I was knocking him off the ball a lot and he didn’t like it," he told The Sun newspaper this week. “He just went ‘Wallop!’ and whacked me in the face. Because I’m not small, he didn’t knock me over, but he cut my lip.
“There was a split second when I felt it go through my legs and I was going to grab him and beat the crap out of him.
“But I didn’t, I just looked at him and went: ‘Dappy, really?’ And he went: ‘Ah, Lee, I didn’t realise it was you!’ It just made me laugh. I’m like an older brother to him. I’ll always look out for him. I’ve been with him before and had to say: ‘Calm down!’”
Meanwhile, Bit On The Side host Rylan Clark hasn't held back on his views of ex-generation host Jim.
Rylan explained last year, when the pair were rumoured to be entering the house together: “He stands for a lot of stuff that I won’t stand for.
“I’ll give him he benefit of the doubt, unless he f**ks me off and pushes me over the edge, in which case I will explode.”
Celebrity Big Brother 2014 will start on Friday night (January 3) on Channel 5.
Other celebs linked to the latest series include Apprentice star Luisa Zissman, Made In Chelsea's Ollie Locke, former heavyweight boxer Evander Holyfield and Aussie soap star Alan Fletcher.
Browse pictures of the rumoured Celebrity Big Brother 2014 lineup below...