Bree and easy blog exposed as a fake.
More than a million people watched the series of films posted by lonelygirl15 on the YouTube website.
The videos featured a 16-year-old girl, calling herself Bree, pouring her heart out in her bedroom. But amateur web sleuths uncovered links to the Creative Artists Agency in Los Angeles, forcing the creators to admit that Bree is an actress.
A statement on the site said: "Our intention has been from the outset to tell a story - a story that could only be told using the medium of video blogs and the distribution power of the internet."
Bree's films have provoked a storm of interest in chatrooms.
But it now looks likely that they are simply the start of of a marketing campaign.
Her hints of an interest in black magic have fuelled theories that her blogs are plugging a new horror film in the style of scary fake documentary The Blair Witch Project.
Girl's world: Blogger Bree apparently filmed herself in her own bedroom' Cut it out: Blog fans are outraged after Bree was exposed as a hoax' You've Breen framed: Is the guy on the bed her boyfriend or another fake?' Scary: Blair Witch Project hoax tricked some film fans