I saw this on FAIL Blog (http://failblog.cheezburger.com/) and thought it might be fun to try adding to the list here.
Have You Seen That One Movie Where Morgan Freeman Plays Somebody Awesome?
(https://songcrafters.org/community/index.php?action=dlattach;topic=18125.0;attach=19366)
Here's mine to start things off...
Have you seen that episode of Gilligan's Island where the castaways almost make it off the island, but Gilligan screws up and they lose their chance?
Since Songcrafters is a music site, I've changed the subject to "Have you seen/heard..."
Have you heard that Led Zeppelin album where they ripped off the songs from a bunch of other artists?