The Daily Grind Video

Rihanna was seen going snorkeling on a boat in Hawaii on the last day of her vacation… in a thong!

RiRi has really been showing off them cheeks while on her vacation and why would she wrap things up in any other way?

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Rihanna and two female friends boarded a small motorboat outfitted in lifejackets and snorkeling gear to check out the wilderness under the clear water.

When not emerged in the leagues under the sea, the Bajan princess was seen frolicking about in the water with friends and enjoying a few beers while sporting the snorkeling gear on her head.

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When the pop diva wasn’t running amuck in the ocean, she was oiled up waterside with friends taking in the sun in the sexy multi-colored bikini.

Check out these photos of RiRi, you won’t regret it!