The plus-size reality TV personality shared a print-out of herself posing in a gold bra and matching underwear with her 711,000 followers.
She then added an image of herself pouting while wearing lingerie, sparkly skin-coloured tights and a halo made of tinsel.
"Always an angel #not," she wrote.
The pictures were followed by the announcement that Collins will be launching a new fashion range in sizes 14-32 with Simply Be.
Collins unveiled a similar collection through her own website back in July.
"Just because you're bigger it doesn't mean you can't dress well and be glam," she said. "Girls should be proud of their figure no matter what size you are - I am."
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