The aristocrat was not in a good mood when she heard the public had chosen her for the Sc-Area 51 challenge, to be broadcast on tonight's show.
Lady C bluntly replied: "You're on a diet."
She then added: You are all on a diet, prepare yourselves. I don't even want to know what it is. I'm not doing it, I've done quite enough."
On spinoff show I'm A Celebrity… Get Me Out Of Here NOW!, hosts Ant & Dec confirmed that they're not sure whether Lady C will go through with the trial.
Dec said: "I don't think she's going to do it. We will try our best to convince her but I don't know, she has such a bee in her bonnet."
Ant was more optimistic, saying: "The other day when she was scared and didn't want to do that other trial, when we had a laugh with her and talked about threesomes, she did the trial and got better and better."
It all kicked off with Lady C on last night's show, after she returned to the jungle from the Bush Hotel with Kieron and Chris and immediately wanted to know why Tony and Jorgie had refused to help them with the task.
Ladu C, Kieron and Chris had nominated Tony and Jorgie to act as their bellboy and chambermaid for the challenge, but Tony and Jorgie declined.
That all led to a MASSIVE row at camp where names were hurled around, voices were raised and generally everything kicked off… For your full recap of the jungle row click here.