MTV UK thinks that’s a big pile of blow on that bloke’s head, and strongly implies RiRi was partaking of it when these pics were snapped. “The Bajan R&B princess was sitting atop the shoulders of one of her minders at the time [these pics were] taken, at the Coachella Music Festival. When fans looked at a close-up of one of the images she put up on Twitter they were amazed to see her fiddling with what appeared to be a pile of powder on top of her minder’s shaved head. But other fans speculated that she may have been rolling a joint on the man’s head. The image was not clear enough to be certain.” To me, it looks like a blob of cottage cheese that she’s scooping up with a nacho, but what do I know? Oh, and Rihanna’s typically elegant reply? “MTVUK: PATHETIC CUNTZ,” she tweeted. But as she took down the photo a few minutes later, one has to wonder.