Rihanna's disc opened in fourth place on the US chart, while Chris had to settle for a seventh-place debut.

VOA: standard.2009.12.25

On November 23, Rihanna released an angry, edgy album,titled Rated R, while two weeks later, Chris Brown responded with his third album,Graffiti.

VOA: standard.2009.12.25

While we were busy decoding Rihanna's twitpic game, Tran retaliated with Nicki Minaj lyrics on her Facebook.

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Rihanna, Sting and Taylor Swift also performed, while Bruno Mars joined Ziggy and Damian Marley in a tribute to the late reggae star Bob Marley.

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The Euro-club sampling craze is taken to its bizarre extreme on "Live Your Life, " on which guest Rihanna borrows her obnoxious hook from Moldovan pop group Ozone, while "Whatever You Like" serves as T.

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