Rebecca Adlington has hit out at campmate Amy Willerton in I'm A Celebrity... Get Me Out Of Here!
The Olympic medal-winning swimmer took offence after a debate about beauty pageants - which saw Miss Universe Great Britain-winner Amy defending taking part in them.
She said: "I'm completely natural, I don't have hair extensions. There's nothing about me that's artificial apart from my gel polish."
But Rebecca claimed they made her feel "very, very insecure".
She explained: "For me, I was an athlete, I wasn't trying to be a model, but pretty much every single week on Twitter I get somebody commenting on the way I look."
But Amy protested that she has felt far from beautiful as the "15-year-old me covered in acne and braces and glasses".
She continued: "I've been there, I know what it's like not to feel beautiful."
Talking it over with EastEnders actress Laila Morse afterwards, Adlington said: "It's just one of those things. She doesn't know what it's like on a day-to-day basis. She's stick thin, she's got these push-up bras that make her boobs seem massive. She's stunning."
And she later concluded: "To me, it's not to do with her as a person. It's the image she portrays that girls should be stick thin and beautiful."
Meanwhile, Joey Essex cemented his reputation as the show's golden boy, winning seven meals as he took on his third consecutive Bushtucker Trial.
He grabbed stars from a water-filled submarine containing eels, spiders, crabs, lobsters and baby crocodiles.
And he expressed his pride at his performance for the newly-joined teams afterwards.
"I've just got another five people who I suppose I've got to feed," he said. "Getting stars is important, so the camp are happy that I brought them the food tonight."
We told you yesterday how Joey Essex had offended Rebecca with a remark about Amy.