Former TOWIE star Gemma was among the rumoured names for last year's series of the ITV show, which was eventually won by Geordie Shore favourite Vicky, 28.
Speaking to Daily Star Sunday, Vicky said: "There were rumours [Gemma] would be in the jungle with me. I'm not going to lie, I was terrified and dreading it.
"I would love to say I would stand up to her but she is very good at intimidating and doing what she does and I would probably end up being on side with her and I would hate that."
Vicky added that she thinks Gemma "thrives on being the Queen Bee."
Essex star Gemma, 35, appeared on I'm A Celebrity back in 2014 but memorably lasted just three days before quitting, later saying she hadn't been in the right mindframe to compete on the show because of something that had happened in the UK before she left for Australia.
Rumours then circled that she would get a second go in the jungle in 2015, but that turned out to be untrue.
Gemma is now in the Celebrity Big Brother house.