Singer Rihanna’s camp has declined to officially comment on Chris Brown’s apology statement, but sources say that the “Umbrella” crooner is “appalled” by Brown’s statement. “All of us, including Rihanna, don’t understand how he can say he’s sorry on the one hand, but still… does not admit any guilt,” a Barbados pal of Rihanna tells the Chicago Sun-Times. “He should have expressed more contrition.” After a week of negative press for Chris subsequent to the alleged abuse of Rihanna, Brown released a statement saying he was “sorry and saddened… over what transpired,” but did not go into detail about the altercation. A source close to the Rihanna told the newspaper that RiRi is “royally pissed off” at what she calls Brown’s “cavalier and arrogant statement.” Both singers are currently keeping a low profile. Chris is due in court March 5.