Here’s the source of the false rumor:
Actress Sandra Bullock died while filming a movie in New Zealand early this morning – August 8, 2012
Preliminary reports from New Zealand Police officials indicate that the actress fell more than 60 feet to her death on the Kauri Cliffs while on-set. Specific details are not yet available.
Believe us: If Sandra Bullock died, you wouldn’t have to go to some obscure website that nobody has ever heard of to read about it.
Fortunately, most Twitter users realize this is just another dumb hoax: