Megan McKenna is "shaking with fear" over her "The Real Full Monty: Ladies" Night" strip after being blasted by trolls.
The 25-year-old reality TV star is joining the likes of Loose Women's Coleen Nolan and TV presenter Sarah-Jane Crawford on the upcoming show, which showcases stars stripping to raise awareness of breast cancer, but the former "The Only Way is Essex" star has reservations after receiving online abuse.
She said: "My fans can be really harsh and the amount of trolling I get is a nightmare
"I've been told I have the body of a 10-year-old boy, which is nasty and spiteful. People say things like, "This girl has such small t**s, she should get a boob job."
"About a year ago, a young boy managed to get hold of my phone number and he called up when I was home alone and started shouting, "pancake t**s", over and over again.
"These trolls are sad people and I'd never want to be them but at the same time I'm only human and it does bother me."
The "Ex On The Beach" star is conquering her "biggest fear" by appearing on the show - which airs on March 28 - but admitted the rehearsals, which were meant to boost her confidence, left her more terrified.
Speaking to The Sun on Sunday newspaper, she said: "Getting naked in public is one of my biggest fears so I can't believe I am going through with this.
"I've been worrying about it every day. Ever since I signed up it has been the first thing I think of when I wake up in the morning.
"The intimate rehearsal in front of my friends and family was supposed to boost my confidence but actually did the opposite - I was absolutely s****ing myself."
But the brunette beauty is looking to the rest of the women for support when they bare all for a good cause.
She added: "I know I will be shaking with fear when we film but the other girls have been great and we've all been supporting each other."