The 25-year-old flooded her Instagram account with images of herself flaunting her toned body in various pieces of swimwear and looked like she was having a great time with her pals, as they enjoyed the beautiful hotel scenery and took a boat ride.
The breathtaking sea view was captured in a number of RiRi's photos, where she was also seen wearing a cool black swimsuit, which featured netting at the back.
In one snap, Rihanna is stood at the front of what appears to be a private yacht and is seductively looking over her shoulder, while surrounded by idyllic mountains and turquoise coloured water.
The songstress simply captioned the picture: "She x Thailand".
A few other images taken on the yacht show RiRi sporting a skintight wetsuit with short sleeves and a zip down the front. And despite being by the sea, she is still wearing her trademark red lipstick.
Proving that she has an unlimited amount of bikinis at her disposal, the 'Pour It Up' star then changed into yet another two-piece and posed for more photos back at her hotel.
She flashed her enviable figure in a cute pink bikini, which featured a bow around the bust, and she accessorised with a wrist full of jewellery, a subtle gold necklace and some flowers in her hair.
RiRi wrote beside one of the shots, "free your mind from mental slavery! #meditation #thailand", while also referring to Thailand as "paradise" and claiming that she didn't want to leave.
The singer took a break from her 'Diamonds' world tour over the weekend to visit the island of Phuket, but she was soon back to work and headed to Singapore last night (22 September) to perform for 65,000 fans, including our very own David Beckham!
Which swimwear shot of Rihanna do you like the most? Let us know below, as the best comment each week wins £50!
Check out more pictures of RiRi in bikinis in our gallery below.