Mr. Bungle said:
The worst element in the Star Wars movies (as they stand now) belongs to "Jedi Rocks" in the piece of shit ROTJ Special Edition. Only reason I think that's worse than the two-headed announcer from TPM is that it's a grotesque CG replacement of a puppet band that worked just fine before being fucked with and thus ruining the scene.
It's not the craptastic CG, IMHO, that utterly ruins the scene but the godforsaken Satanic pseudo-music itself.