Yeah, yeah, we all knew that Rovio was doing gangbusters with Angry Birds series, but here's a little number to put it all into perspective: one billion. That's how many times the slingshotting birds have been downloaded, when you add up all of the titles and all of the platforms. Naturally, the company made a video to celebrate the accomplishment. You can find it after the break. [Image credit (McDonald's Sign): Alexis Bea /