How can South Park make fun of every single celebrity in a rude fashion and not get sued ?

In the 1980's Hustler magazine was sued by Jerry Falwell because they mocked him in the magazine. In the end the Supreme Court ruled that a celebrity can be made fun of if it is satire. Since South Park is an extreme show that nobody takes seriously they can mock celebrites all they want.

The 1st Amendment.

As far as celebrities are concerned, any publicity is good publicity.

True except with tom cruise.