Rihanna has responded to those circulating cocaine rumors in the most Rihanna way possible. By posting this cheeky picture of her sipping on a can of coke, which she captioned Petty. The singing super star was accused of snorting cocaine at Coachella this weekend when a video popped up online. The clip appeared to show the Diamonds singer holding a tube in her hands while her friends danced around her then she was seen rubbing her nose as though she had just snorted something.