Rihanna Wows in Revealing Thong Monokini—See the Sexy Pics!

Barbadian beauty was photographed cooling down in a waterfall at a botanical garden in Rio de Janeiro

Another day, another photo—or photos—of Rihanna looking positively sexy in a stylish bathing suit.

The Barbadian beauty's latest choice for a relaxing day in Rio de Janeiro was a black monokini, which featured a low plunging neckline as well as thong bottoms.

The "Diamonds" singer was photographed enjoying a cool down session at a serene waterfall in a botanical garden.

The 25-year-old kept her long and natural locks down as she took a dip in the water and finished the revealing look with a bright red lip.

In addition to the waterfall pics, Rihanna added several steamy snapshots on Thursday, Jan. 16, to her Instagram account in a skimpy black bikini.

The Grammy winner most recently went topless for a racy Vogue Brazil photo shoot on the beaches of the Brazilian Island of Angra dos Reis.

Rihanna showed off her curves and lots of skin in only high-wasted gold hot pants and a colorful scarf wrapped around her hair. She also donned large hoop earrings and dozens of gold bracelets with only tiny pieces of tape on her breasts that did very little to cover her nipples.

Natch.