This is hilarious.
Apparently Jonathan Coulton did a folksy version of Sir Mixalot’s Baby Got Back. That in itself is a funny thing, but someone else took Jonathan’s version and married it to the original video. You can watch it here:
As if that’s not funny enough, Mike Hightower made a Gilbert and Sullivan version of the song and then created a video using scenes from the movie The Pirates of Penzance! Watch that version here: