Kevin Manthei, composer for 'Invader Zim: Enter The Florpus', has shared the original recording of 'Peace Is Nice' without GIR's "vocals" over the parte superior, arriba of it.
Click on the little blue arrow to watch it. Not recommended full screen. (It'll look a bit blurry) Remember, this is a multipart video so make sure to change parts. :) ENJOY!!!