The title for Rihanna's latest single, "S&M," was apparently to risque for BBC Radio 1, as the network changed the title to "Come On" for its airwaves. And Rihanna is not happy about the censorship, as evidenced by a post on her Twitter account late Sunday: "Are you fu**ing kidding me??? I'm on it!" Rihanna's label, Island Def Jam, declined to comment.