I'm looking for songs that are the melody of one song, but overlay entirely different lyrics with the same rythm that make fun of a then-recent event. i'm not just looking for literal music videos, because those are popular satire versions, but also for stuff like the bin laden bomb song (http://www.youtube.com/watch?v=zjv7PZTxiz0), we didn't start the flame war (not going to link it because it's slightly NSFW), basically satire poured into a song.
Reminds me of a Danish affair a few days ago. Two Danish comedians joked about a 100-year old classic song and sung something along the word ‘penis’ instead of the original word, and then the writer of the song’s grandson sued DanishRadio1 for satiring and ruining his respected ancestor’s beautiful song. It was really humorous.