Jackson concert promoters slam singer's assistant

Michael Jackson's former concert promoters have slammed the singer's assistant for filing a 'frivolous' class action lawsuit against them.

Michael Amir Williams is suing AEG Live for lost wages.

The plaintiff claims AEG executives negligently employed Dr. Conrad Murray on the singer's doomed This Is It tour in documents filed in Los Angeles Superior Court on Friday.

The physician was convicted of administering the King of Pop with a fatal dose of Propofol in June 2009, before he was able to perform in concert.

According to the lawsuit, AEG agreed to pay the singer's staff up to $7.5 million for services rendered on the tour.

A spokesperson for AEG has dismissed the claims and argues Michael Williams was not a beneficiary of Michael Jackson's contract with the company.

"This lawsuit is clearly frivolous; it is literally barred by at least four different legal doctrines,' reads a statement to TMZ.

"The idea that Mr. Williams purports to sue on behalf of the many persons who did enter into relationships with AEG Live and Jackson... and with whom AEG Live parted ways with the utmost friendship and respect, is disgraceful."

The plaintiff is seeking unspecified damages.

Conrad Murray was convicted of involuntary manslaughter in November 2011.