What a difference a preposition makes. Oscar for is one thing - Oscar in is quite another. Rare as it is for a film to win an Academy Award, it's rarer still for a film to include an Academy Awards scene. Usually, the scene's played for laughs; and when it's not, maybe it ought to be. Either way, it's Hollywood self-congratulation at its ripest. With this year's nominations announced last Thursday and the big night only four weeks away, here's a look at Oscar onscreen.

—Mark Feeney, Globe Staff