When it was revealed last week that Kristen Stewart had cheated on her boyfriend Robert Pattinson, there was possibly only one person more devastated than R Pattz himself. Emma Clarke, 25, from Carlisle, a huge fan of the “Twilight” films in which the couple star, posted a self-filmed rant on YouTube that sees her break down in tears over Stewart's actions. "I don't understand why she would do this?" she cries. The video instantly went viral, notching up a million hits in just one day.