Michael Jackson's former assistant Michael Amir Williams has sued concert promoter AEG, saying he lost out on a massive paycheck because AEG negligently employed Dr. Conrad Murray for Jackson's "This Is It" series of shows.

Murray was eventuallyt convicted of manslaughter for administering the dose of Propofol that killed Jackson.

A rep for AEG told TMZ, "This lawsuit is clearly frivolous; it is literally barred by at least four different legal doctrines."

Yeah ... well, is it barred by the Monroe Doctrine, smart guy?

Sorry. That made about as much sense as this lawsuit.

Anyway, AEG contends Williams doesn't have a case because he was never a beneficiary of Jackson's contract with AEG, so he can't legally bring a claim for Jackson's wrongful death.

As far as AEG is concerned, Williams' lawsuit is an attempted money grab that won't work.

"This is just the latest wrongful death lawsuit with someone hoping to profit from Michael Jackson's tragic death in the same way they profited from his life."

Contact Tony Hicks at thicks@bayareanewsgroup.com or on Facebook at www.facebook.com/BayAreaNewsGroup.TonyHicks.