It's already a well established fact that the album cover has grown to become a treasured piece of art.
Often depicting the content of the record or something wildly unrelated, to many, the album artwork is what completes a record.
So it's refreshing when an artist acknowledges this and takes it one step further by placing hidden images inside the picture.
From The Rolling Stones to Black Sabbath, our new feature take a look at some of the best examples, as well as others where spotting the hidden image is quite a challenge.
Check them out below.
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