Rihanna is back with the video for “Pour It Up”. You may have heard the song, it’s been played almost on the minute on every radio station and club across the country this summer. Anyway, whoever thought Miley Cyrus had a lot of (attempted) twerking never saw a Rihanna video. It’s a full palette of twerks and booty shakes, and even Ri Ri gets in on it, baring her backside to the world yet again. She may be almost as ratchet as Miley, but at least she can back it up. . .