Rihanna is the pitchwoman for Vita Coco, the brand of coconut water endorsed by and invested in by her fellow pop diva Madonna.

While RiRi is summery in the campaign shots, she's not naked for once in her life. She's rocking a custom-made, high-waisted, pineapple print bikini, nodding to the old school bathing suits of yore and the fruit-festooned style of her BFF Katy Perry in one fell swoop.

In the campaign, RiRi's hair is shaggy and blonde -- and her gorgeous smile and glowing skin dominate the images. The pineapple pattern is a nod to the Tropical Fruit flavor of the beverage, which was co-created by Rihanna herself! So she's not just looking all sexy in the advertising. She actually helped craft a variety of the drink.

The campaign's theme is "Viva Vita," imparting a message about having fun and celebrating life, all the while taking a big gulp of Vita Coco. It's all about YOLO – you only live once! Who better embodies the spirit of having a good time than RiRi?

The brand also encourages people to "please hydrate naturally," a slogan which appears on all ads, inviting consumers to drink Vita Coco and enjoy the nutrient-rich hydration.

The 'Where Have You Been' goddess is featured in the print, radio, digital and in-store advertising for the brand, which runs in both the U.S. and the U.K., which are Vita Coco's biggest markets.

The Vita Coco shots were taken by Terry Richardson – who posted candids of RiRi in all her thumb-sucking, short shorts glory, as well- at his Milk Studios in New York City. It was the first time he and RiRi partnered up, but if judging solely by the sizzle of their partnership, it won't be the last.

There are also some smokin' images from behind-the-scenes at the shoot, featuring RiRi in a pineapple print robe and a tight, short yellow frock. She's so summer-ready in these shots and we love that you can see a bit of the photog's arm and the photo equipment. You feel like you are on set with the Bajan beauty.

Drink up... coconut water, that is!