An eBay seller blundered when she posted a picture of a dress — not realising she could be seen KNICKERLESS in a mirror.

Horrified Aimi Jones, 21, quickly spotted her embarrassing gaffe after trying to flog the yellow frock on the auction site.

The waitress removed the picture in which she wears just a bra but it had already been seen — and was posted on Twitter and Facebook.

SEE ALL THE PICS AND THE WHOLE STORY HERE ... AND BECAREFUL WHAT YOU POST!