Vida Guerra is worried someone's on her ass ... and she wants help from the LAPD to keep it safe.
According to our sources, the butt model filed a police report claiming she's been receiving emails from an obsessed fan. We're told the guy has been professing his love for her, making a full-court press for a happily ever after relationship.
Law enforcement sources tell us the LAPD doesn't feel the emails are particularly threatening ... just really creepy ... but they've opened an investigation just to be safe.
Guerra had no comment.