Rihanna has an alleged stalker who was so invasive in her life, he sent her a masturbation video.
According to a search warrant, obtained by TMZ, the man had been dogging Rihanna, sending her threatening tweets between April and June of last year, saying among other things, "Should have killed @rihanna a minute back I would be good right now."
The man also said, "I use guns, bout to get a gun license."
But the search warrant makes it clear the man did things even more deranged, posting a 15 second masturbation video to Rihanna.
As we reported, the man also posted a pic (below) of him standing outside Rihanna's former home, saying, "Outside yo house."
The warrant says Rihanna's in fear for her life.
We're told cops found the guy and put him in a psychiatric hospital, where he remains.