Kristen Stewart is worried her stardom might lead to someone killing her one day. The Twilight actress - who recently confessed to cheating on co-star Robert Pattinson with her Snow White and the Huntsman director Rupert Sanders - fears someone will log on to a social networking site to find out her location, then travel to where she is and murder her. In an extract from new e-book Robert Pattinson, Kristen Stewart, Taylor Lautner - In Their Own Words by Talia Soghomonian, she told interviewer Sian Edwards said: ''Nowadays it's harder because everyone is on Facebook and everyone knows where you are all the time, and everyone's twittering. Like I'm going to die because somebody is going to say where I am and somebody is going to kill me. Someone's going to twitter my location and then it's going to be like, boom.'' While the 22-year-old star fears sites such as Facebook and twitter can be harmful in terms of her safety, she admits the communication possibilities on the webpages are ''really great''. She added: ''I actually think too much of anything can be scary, but at the same time it's also an opportunity. I mean mass communication is a good thing. It's actually a really great thing, it's just scary.''going to kill me. Someone's going to twitter my location and then it's going to be like, boom.'' While the 22-year-old star fears sites such as Facebook and twitter can be harmful in terms of her safety, she admits the communication possibilities on the webpages are ''really great''. In an extract from new e-book Robert Pattinson, Kristen Stewart, Taylor Lautner - In Their Own Words by Talia Soghomonian, she told interviewer Sian Edwards said.