Which picture of James Dean Appeared in Grease?

It's a common misconception that a picture of James Dean appears in the movie "Grease." While there are several nods to classic 1950s culture in the film, a picture of James Dean is not one of them.

It's possible you're thinking of a different film or perhaps a scene you've seen that you're misremembering. Would you like to try and clarify what you're thinking of?