Harmer, who is currently training for Strictly with pro partner Vincent Simone, said that she wouldn't let jibes about her size get her down.
© BBC
"Hate on me as much as you like! But I like being curvy! #ShakeWhatYourMummaGaveYa," she wrote.
One fan said: "Too right and there's nothing of you, you're a size 6 to 8! Grrrrrr it makes me soooo mad."
Harmer replied: "Oh I know! No wonder there's so many girls that feel insecure!"
She told another supporter: "I know people are ridiculous! But I've never let it get to me and it won't start getting to me now!"
Harmer also revealed that she had a "lovely" training day with Simone, which featured an appearance from her younger sister Betsy.
She told Strictly co-star Lisa Riley that her only problem at the moment on the show was "being sexy". "It's not coming naturally!" she wrote.
Strictly starts on Friday, October 5 on BBC One.
[Strictly Celebs in Training - Photo Gallery]
Denise Van Outen tweeted this picture of partner James Jordan in training with the caption 'I'm making @The_JamesJordan put deodorant on before we dance.'
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Copyright: Twitter Denise Van Outen
