Robert Pattinson's single mystery

The heartthrob actor has been dating his 'Twilight' co-star Kristen Stewart since meeting on the set of the movie but has reportedly been telling crew of his latest film 'Water for Elephants' he is not romantically involved with anyone. An insider said: "Rob is not dating anyone. There are no plans for Kristen Stewart to visit the set and he tells everyone he is single." The 24-year-old star