LATEST: Anna Nicole Smith's longtime companion HOWARD K. STERN has blasted reports of a sex tape documenting his alleged gay affair with LARRY BIRKHEAD as "absolutely absurd". The rumours emerged after U.S. journalist Rita Cosby made the allegations in her tome Blonde Ambition: The Untold Story Behind Anna Nicole Smith's Death, claiming the late model's two former lovers had been caught having sex on camera. But Stern insists the reports are all based on "false information". He tells Entertainment Tonight, "Most of these... sources to Rita Cosby's book, they were doing media after media interview after Anna passed away and they took every shot at me that their imaginations could possibly dream up. "And all of a sudden, the same people are coming back and they're saying, 'Oh by the way, I forgot… Howard and Larry are gay and there's a video of them together.' It's ridiculous. I mean it's absolutely absurd. "That woman Rita Cosby is either the dumbest person on earth or she knows that she's printing false information. And I don't think she's the dumbest person on earth." And Stern is worried about the impact the rumours will have on Smith and Birkhead's one-year-old daughter Dannielynn when she is old enough to understand the allegations. He adds, "Dannielynn is gonna read this garbage and it's almost like she's going have to get counselling from the age of three." Photographer Birkhead is already preparing to sue Cosby and the book's publisher over the accusations.