Sometimes fans can turn Stan and get a little scary. Keri Hilson has dealt with an avalanche of hate from Beyoncé fans for years — many believe that she subliminally dissed her fellow bleach-blonde singer in a leaked track four years ago. She recently posted a blog complaining about the attacks. "It’s TOO much!! Please! Is everything I tweet gonna be 'intentionally misinterpreted' as a statement about someone/drama I know nothing about? You have no idea what your hateful words could do to someone’s spirit. Years of verbal abuse from strangers all day long. Enough is enough!" she wrote. But Beyoncé's so-called "Bey Hive" aren't the only over-the-top fans out there. Read on for a look at different music stars' obsessive stan clubs.