The former Coronation Street star, 69, admitted to the Waterloo Road legend and comedian Seann Walsh that she was struggling to go to the toilet while staying at Savannah Scrub.
The spin-off, which is filmed in the Kruger National Park in South Africa, sees a group of famous faces who have previously taken part in the original series return to camp.
Adam Thomas , 36, and Jimmy Bullard, 47, are said to have had an explosive row during filming for the spin-off series, which will return to screens next year.
The former S Club singer, 44, and her partner Adam Thomas quit the UK with her two daughters Taya, five, and Tora, four, back in January, after a difficult time.