Ferne took part in Dicing with Danger with fellow late arrivals Vicky Pattison and Spencer Matthews, where she was joined by two pythons and two rounds of cockroaches in perspex boxes, and it was Ferne's screams and squealing that was the talking point of the show.
Ferne's reaction even left Ant and Dec in hysterics as they tried their best not to laugh.
Speaking on I'm A Celebrity...Get Me Out Of Here NOW!, Ant told host Laura Whitmore: "It was funny. All three of them had completely different reactions. Ferne, I was wondering if she was putting it on, but actually, I think she was that scared.
"She was very loud... she did well. It was a very long trial to shoot, it took a long time. We did ask her [if she wanted to quit] and she did think about it but she stuck it out."
Laura agreed, adding: "She was very good at screaming there, but she never asked to leave."
Fans took to social media following the trial, which Ferne actually ended up winning after rolling her dice to the top of the board.
Before going into the jungle, Ferne revealed that her biggest phobias were "snakes, any animals like an ostrich and jumping out of a plane".
She also told Mirror Online: "I'm actually scared of the usual stuff like snakes and spiders and stuff. When I was younger, about eight, a snake bit me.
"My cousin randomly had one as a pet and like I probably shouldn't have been putting my hand in the glass container thing and it just went for me. They're like a substantial animal aren't they? It's not like the bugs and critters."
I'm A Celebrity...Get Me Out Of Here! airs at 9pm on ITV.
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Watch Ferne's trial below:
I'm A Celeb full line-up: