Serious question: How do south park get away with insulting celebrities on their show? They have insulted Paris Hilton, Michael Jackson, Russel Crowe, Barbara Streisand, etc, but they always seem to get away with it.
Surely that little disclaimer at the start of the show can't be the reason why, can it?

Saturday Night Live and MadTV insult them all the time too. it's not illegal to insult someone.

That and everyone expects it from them.

elliott.

you can't be sued for defamation if its satire

south park gets away with it through the same way political cartoons/caratures do.

Welcome to America! We're all fair game at all times, it's f*cking great. Did I mention our president has no brain and a small *@%#!.

"you can't be sued for defamation if its satire"

Not necessarily true. You may have a hard time getting a favorable outcome if the "satire" is only exaggerating existing traits, but you can sue for anything.