The Fun House star held court with a silent Mark Wright, Crissy Rock, Dougie Poynter and Jessica-Jane Clement over the pair.
The 50-year-old first accused 'So Macho' singer Sinitta of seeking tabloid attention by exaggerating her fears in her bushtucker trials.
Sharp declared: "It p*sses me off and I don't give a flying f**k anymore. Whatever phobia you have we know that these [creatures] will not hurt you so... just get in there and do what they want you to do. If you come out being all scary just to get in the papers or whatever, then that is pathetic.
"I think there's a bit of, 'Oh, look at me'. She's not stupid, and she knows how the world works. She's milking it. She might have tried her best but it just wasn't good enough.
"It's about mentality, you are either strong minded or you are not. I would not enjoy any of the things she's had to endure but I would still not look like a moron doing them. She looks ridiculous. She's wimping around on this show."
Of Chase, the presenter complained: "Lorraine is the nicest woman I've ever met but her holding a teddy is sweet but it doesn't work in here - she's not 4 years old, she's 60, and she wraps it up and puts it to bed.
"I don't get it. There is no room in here for a nice person - that's naff, saccharine, sweet. Her teddy is called Tedward, given the choice I would strangle Tedward over Jedward - that makes you realise how angry I am."
Finally confronting the ex-Emmerdale actress, he said: "You are too nice for me Lorraine. Don't walk past just saying, 'Look at the lovely trees'."