Singer says clip is for an upcoming Doritos endorsement. By James Dinh Rihanna (file) Photo: Jamie McCarthy/ WireImage When Rihanna revealed that she’s left behind her dark days of Rated R and moved to a happier place, she wasn’t kidding. Not only has she taken the dance floor by storm with her first single from Loud, “Only Girl (in the World),” she’s done the same in a new video for the dance tune “Who’s That Chick?” which leaked online on Friday. Jonas
