Well, yes. Because people have proven they want to hear the latest about Brangelina, it is news. (But that would never happen. Brangelina are Solid. Solid as a rock.)
From wikipedia: And IIRC, TMZ was the first to break the story about Brittany Murphy. That's a pretty big news story.
Granted, it's been 8 years since I graduated from the Greenlee School of Journalism at Iowa State, but I think all the professors would agree that news gathering and reporting is a constantly evolving field. With the advent of instantaneous communication, that has given prevalence to "news" being broken much quicker and in non-traditional fashion. That also means that "news" reaches a much larger audience than in years previous. It also means that anything anyone posts on a public forum (such as Twitter, Facebook or internet message boards) is fair game. If he didn't want that information out there at all, he should have refrained from posting it.
What are we arguing about again?