The 'So Macho' singer, who also appears as a guest judge on The X Factor, will fly to Australia in the next few days to prepare for the series.
She is said to be terrified that viewers, including friends such as Simon Cowell, will vote for her to do every Bushtucker Trial - as has happened to previous contestants in the past.
"She is frightened that she will get all the trials for the comedy value," a friend told the Daily Star Sunday.
"She has worn some outrageous things on The X Factor, including leaves, so she will be right at home in the jungle."
Benidorm actress Crissy Rock, comedian Freddie Starr and former Big Brother contestant Imogen Thomas have also been linked to the new series of I'm A Celebrity.
The Only Way Is Essex star Mark Wright, who is rumoured to be quitting the ITV2 reality show, has also been tipped to enter the jungle when the new series starts on ITV1 next month.
An I'm A Celebrity spokesman said: "Any names suggested are pure speculation at this stage."