Anna Nicole Smith's former companion Howard K. Stern filed a defamation lawsuit on Tuesday against an ex-bodyguard for the father of Smith's daughter, Larry Birkhead, and the sister of Smith's ex-boyfriend, blaming them for the alleged lies contained in a book.

Stern also has a $60 million libel suit pending against author Rita Cosby and Hachette Book Group, which published "Blonde Ambition: The Untold Story Behind Anna Nicole Smith's Death," in U.S. District Court in New York.

According to documents filed Tuesday in L.A. Superior Court, Stern contends that an ex-bodyguard for Birkhead, Mark Speer, fed Cosby false information.

Meanwhile, the sister of one of Smith's ex-boyfriends, Elizabeth "Jackie" Hatten, is accused of telling Cosby that she witnessed Stern giving drugs to Smith.

Stern also alleges that Hatten is the so-called eyewitness who told Cosby about seeing Birkhead and Stern, pants down, "being intimate with each other."

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