'No Doubt' song parody funny/mean/musical ? :)

Hi All,

Here's 'No Doubt' parody called 'Don't speak (you are so dumb my dear)' http://www.youtube.com/watch?v=9_D6MEONZx8

What do you reckon?

I hope it's funny and musical and not overly mean?

Thanks,
FunnyOddSongs.