Rihanna Jet-Skis in Bikini in Hawaii After Snuggling With Chris Brown: Picture

Rihanna goes jet-skiing in Hawaii on Feb 21, 2013. WSB/Splash News Online

Rihanna sure knows how to celebrate her birthday in a very big way! The "Stay" singer continued her week-long birthday celebration in Hawaii by catching some waves aboard a jet ski on Thursday, Feb. 21.

But she wasn't alone! The fun-loving songstress held on tight to the back of the jet ski as pro surfer Makua Rothman manned the vehicle through the clear Hawaiian waters.

Just one day before, the Barbados beauty was photographed holding two blunts and boyfriend Chris Brown's hand during a seaside stroll along the surf. Rihanna, who turned 25 on Wednesday, Feb. 20, wore a bright pink bikini barely concealed by a mesh cover-up skirt for the sunny outing.

"#epic day already, I woke up to sunshine in paradise and #STAY done jumped 54 spots to #3 on the BillboardHot100!" she tweeted excitedly at the start of the day. "Walked up into #2013 like I owned a ho."

Earlier in the day, she shared photos of herself with her on-again beau partying it up in what looked like the back of a limo, with the caption: "Pour it up pour it up! #birthdaybehavior."

It was a switch-up for the controversial couple, who were previously at odds last week during a Valentine's Day party at Hollywood club Playhouse on Friday, Feb. 15. An onlooker told Us Weekly that Rihanna "refused to sit with or even hear."

"When she noticed he was there, she made a huge show of rubbing her presence in his face," the eyewitness added.

Earlier this month, the duo made a splash at the Grammy Awards when they cuddled up in the audience at the music awards, four years after Brown infamously physically assaulted the "Diamonds" singer.

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