The "TiK ToK" hitmaker was preparing for the MTV Video Music Awards when she was caught on camera by a member of her entourage cleaning her teeth, with no clothes on.
Kesha is seen protecting her modesty by drawing her knees up to her chest, but had no qualms about posting the image on the microblogging site, reports dailystar.co.uk.
In an accompanying post, she wrote: "Just naked brushing my teeth pre VMAs."
She was not wearing much on the red carpet hours later either.
She joked that she wanted to "feel naked with a little bit of lace covering my bits".
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