Marilyn Monroe wasn't known for her modesty... and decades after her death, the most intimate pictures of all have been sold at auction for a bra-busting price.

These aren't the famous Playboy images, but X-rays of the most famous chest on earth in 1954, taken when Monroe was believed to be pregnant -- and they've sold for $45,000, according to AOL News.

That's 15 times the pre-auction estimate of $3,000.