The former 'Baywatch' actress - who has kids Brandon, 19, and Dylan, 17, with ex-husband Tommy Lee - feared she was "going crazy" when items kept going missing from her home, but was horrified to discover they were being stolen by an obsessed fan who wanted to "touch" her.
She said: "A homeless person went into my home and was living in my guest house with my 'Baywatch' bathing suit on, slicing her wrists. She had a letter that said 'I'm not a lesbian I just want to touch you.'
"She got my bathing suit out of my room, I was there alone with two babies and I remember seeing a face in a window--isn't it the scariest thing you can think of?--you walk up to a dark window and you're like [shocked].
"I called security who couldn't find her, and then she was in my house. Things kept going missing, where's that loaf of bread, where's my jean jacket, and I'd be like 'Am I going crazy?' She was there for three or four days."
The 48-year-old beauty now keeps her only remaining iconic red swimsuit in a safe as a result of the incident.
Speaking in the new issue of Flaunt magazine - for which she has posed totally nude - she added: ""I have one [swimsuit] and it's in my safe. I got one stolen when that woman put it on, and when the police officer arrested her, they asked me if I wanted it back, and I said 'No, no you can keep it.' "
In 2001, Christine Evelyn Roth, was charged with a misdemeanour trespassing charge of unauthorised entry of a dwelling after she was found sleeping in one of Pamela's beds.
She was subsequently ordered to return to her native France and seek counselling.