Riri sings again

Rihanna hits the recording studio to reportedly lay down some tracks for her upcoming album in Santa Monica, Calif.

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On Saturday night, Rihanna made a surprise appearance at N.E.R.D.'s concert in Kansas City.

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She was seen getting into the groove and dancing on stage. Rihanna's possible ex, Chris Brown, and University of Mary Washington student Erica Jackson reconnected recently when he was back in Virginia.

Their pair was spotted leaving a Sunset Blvd. tattoo parlor this weekend.