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RIHANNA’S BARBA-DOSE OF FUN

Rihanna’s trying to put a little sunshine in her life.

The “Umbrella” singer and crooning comrade Katy Perry (right) soaked up rays and went on a thrilling ocean raft ride (below) this week while vacationing in Rihanna’s native Barbados.

Rihanna has kept a low profile since early February, when then-boyfriend Chris Brown was arrested for allegedly beating her in Los Angeles.

Brown has been charged with two felonies, assault and making a criminal threat. He has pleaded not guilty and is due back in court May 29.

Perry, known for her tune “I Kissed a Girl,” said she’s happy to be Rihanna’s pal during these tough times.

“We’re friends and we’re both kind of on this crazy roller coaster, and . . . it’s nice to have good girlfriends,” Perry, 24, told MTV recently.

“I pride myself on having cool chicks in my life, and she’s a cool chick.”

Rihanna and Brown appeared to have reconciled shortly after the alleged assault, but in recent weeks, they haven’t been seen together.