Side note, the last verse of the song (starting "Be prepared for the coup of the century..." is performed by Jim Cummings, after Irons' voice gave out. (after screaming "you won't get a sniff without me!")
Cummings tried to take credit for the whole song (well, most of it) in an interview, but there's video footage of Irons singing the whole first verse (directly contradicting Cummings), and if you listen to the song carefully (or open up an audio analysis software), you'll notice that Scar's voice only changes starting from the "Be prepared for the coup of the century..." point.