Rihanna Sneak-Disses Karrueche on Twitter - Rihanna stirred the rumor mill even further when she tweeted this pic, of rice cakes "wearing" sunglasses and hoop earrings, with the caption "I'ma make you my b---h," a lyric from "Birthday Cake" (which also contains the line "sweeter than a rice cake"). Tran is half-Vietnamese, and some speculated that Rihanna's tweet was an underhanded racist dig. (Photo: Twitter)