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, reported Daily Star online.
Kesha is seen protecting her modesty by drawing her knees up to her chest, but did not hesitate to post the image on the microblogging site.
In an accompanying post, she wrote, "Just naked brushing my teeth pre VMAs."