As a PR professional, you want your news to spread, right? The folks at the marketing firm Flowtown crunched some numbers to find out which news sites are the most shared.

Not surprisingly, social media guide Mashable came out on top. But one may also be surprised at which “influencers” are driving the sharing. It turns out MC Hammer, Ashton Kutcher and Questlove of The Roots drive some serious numbers. View the full report here.