Zac Efron and his girlfriend Vanessa Hudgens have warned their fans to be wary of fake bloggers posing as celebrities on the internet.
The High School Musical couple insist they have not signed up for any social networking sites - and Efron is adamant anyone using their names online is guaranteed to be a phony.
He tells Moviehole.net, "It's funny, everywhere I go I rep the fact that I don't have any online presence or communicate at all online, but still there's a couple of Facebooks and things that scrape through."
The actor adds to E! Online, "If you have me, it's a poser, don't talk to him. And Vanessa doesn't have any of them, either. None."
While Hudgens, who has 75,000 followers of a Twitter.com page in her name, adds, "I don't know who it is, and apparently, there's a lot of people who think it's me, and it's freaking me out!"
And the actress insists she won't be signing up to any online blogs in the future: "It seems like a hassle, and when I'm home, I just like relaxing."