The 'Diamonds' singer can be seen about to light two rolled-up cigarettes in a coffee shop in the Dutch city, where it's legal to sell small amounts of cannabis.
Wearing a customised veiled pink beanie and mermaid t'shirt, Rihanna is smiling and clearly having a good time.
The 25-year-old has been very public in the past about being in favour of legalising marijuana.
Alongside the images, Rihanna wrote: "Where am I ??? At Heauxm !!!
"I'm just a girl ...#Amsterdam."
Earlier, she had tweeted a picture with her dad Ronald Fenty after her Dublin concert.
Rihanna is currently travelling Europe as part of her World Diamonds tour.
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