Trending: THAT Rihanna Video

…the latest music vid from Riri. It makes Miley Cyrus Wrecking Ball look like a nun. Yes, Miley-flippin-Cyrus. And it takes twerking a whole new level of butt-shaking-floor-grinding-giggly-ness. Just try to watch it without your mouth dropping open. I guess if it was shock factor the singer was going for, she certainly achieved it. And…