The trio were chosen by 'Cult of Celebrity' members Louie Spence, Sophie Anderton and Lauren Harries, who have been watching the group from a secret lair since they all entered the house yesterday (August 22).
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Later in the night, the 'Cult of Celebrity' were each asked to choose one person to potentially go up for eviction in a 'Ceremony of Judgment'.
Spence chose Atkinson, arguing that he doesn't think they have "a huge amount in common" and will likely just make "polite chit chat".
"I don't know much about football," he said. "Well, I know a few [footballers] I fancy, but I don't think that will go down too well with him."
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Anderton picked Stodden because she doesn't "understand why she's doing the show" and is already annoyed by the 18-year-old's "hysterical high-pitched" laugh.
"I don't think I could live with that sort of hysteria," she added.
Harries went for McGiffin, describing her as "really miserable", drawing scoffs from Spence and Anderton.
"We haven't got on together in the past, I don't think we're going to get on in the future," she explained.
The 'Cult of Celebrity' members will later pick one of the three to face eviction.
Celebrity Big Brother continues tonight (August 23) with a special live show airing at 9pm on Channel 5.
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Celebrity Big Brother launch night in pictures: