Tonight, the Tree struck up a conversation with the Irish presenter when he was alone in the bathroom.
"Oy - Trolley Dolly. It's me, the Tree. If any one comes into the bathroom I'll shut up and you come and find me later on - alone! Anyway, you ain't done badly since you were last in the house, have you?”
"Oh thank you," replied Brian.
"Having said that, I ain't seen you on me goggle box lately, have I?" said the Tree.
"Shut up, I've been working in Ireland," smiled the housemate.
"Is that why you're back in here? To restart your career?" asked the Tree. "You're all a bunch of fame-hungry wannabes in my eyes. And you're gonna prove it!"
"How?" queried Brian.
"How would you like to win them lot some cocktails? None of that warm, debranded canned lager you normally get - some nice cold, alcoholic cocktails. Well, I can sort it if you do something for me," the Tree began.
"You've got one hour to get three of them lot to confess to you, separately, that they think they're the most famous person in this godforsaken house. You've gotta get each of them on their own and you can't simply ask them to say it. It's gotta come from them and it's gotta come natural.
"I don't care how you do it but do it within the hour and you'll win the cocktails. However, if you don't or any of them think you're doing a secret mission or if I hear my name mentioned - you'll face the full wrath of the Tree of Temptation."
"I work for Ryanair, I'm very capable. Goodbye," replied Brian.
For his first attempt, Brian got Nikki on her own in the smoking area and suggested that she was the most "memorable" from her series. Nikki said she didn't think of herself like that and eventually Brian gave up.
Feeling frustrated with the task in hand, he went back to the Tree to ask for help but was refused.
Later, he tried to manipulate Ulrika into saying she was the most famous but his plan failed again.
As the end of his hour drew closer, Brian panicked and went back to the Tree to try and strike a deal.
"I have an idea," he explained. "You know how you say I'm nice? What about fuck that shit? What about I get the cocktails and they don't?"
"No," replied the Tree. "But I like you being mean. I like your mean streak."