The pop singer Rihanna, has postponed a concert in Malaysia after she and her companion, the R&B performer Chris Brown, canceled their scheduled appearances at the Grammy Awards, The Associated Press reported. In a statement to The Associated Press, the Malaysian promoter Pineapple Concerts said it had been informed by Rihanna’s representatives that a show planned for Friday would be rescheduled “in light of recent events involving Rihanna.” On Sunday Mr. Brown was arrested and charged with making criminal threats after being involved in an altercation with a woman in his car; the name of the woman was not released. Mr. Brown was released on $50,000 bail. On Monday, Wrigley said that it had suspended an advertising campaign for Doublemint gum that features Mr. Brown as its spokesman.

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