Naomi Campbell used to send Rihanna beauty products, vitamins and "tanning oil".

Naomi Campbell (c) Rihanna's Instagram

Naomi Campbell (c) Rihanna's Instagram

The 'Work' hitmaker has credited the 46-year-old supermodel as her closest "friend" and has admitted the catwalk icon will always makes time for her regardless of her busy schedule, which sees her post the latest cosmetic product, vitamin supplements and sun cream for her holidays to the Barbados-born star.

The 28-year-old singer songwriter shared the news on social media with a string of photographs of Naomi sporting garments from her Fenty x PUMA collection on the Italian Vogue photo shoot.

Alongside one picture of Naomi squatting up against a wall wearing a hooded jumper and knee-high lace up shoes, which Rihanna posted to her Instagram account, she wrote: "What a delight to see this beautiful Queen in my designs for @VogueItalia! This is a crazy feeling man! @iamnaomicampbell From the very first moment in your career, you've touched and inspired so many young girls all over the world! I was one of them, and to see this come full circle is a trip to say the least! I'm blessed to have you as a friend, one that will pick up the phone at any hour of the night, one that still makes time even when she has none, just to send me vitamins and facial products, or even tanning oil for my vacation lol!!! That's why these photos mean so much more to me, you're a True beauty, One love! (sic)."

Rihanna continued to share black and white images of the 'Empire' actress from the campaign on her social media account to show her appreciation to Naomi for wearing her fashion range.

And French stylist Carlyne Cerf de Dudzeele also posted photos of the star - who has graced the catwalk for designer brands including Yves Saint Laurent, Dolce and Gabbana and Vivienne Westwood - laughing on set in the sports luxe attire.

She wrote: "NAOMI IN MY FENTYxPUMA STORY FOR ITALIAN VOGUE STORY !

@francescocarrozzini

STYLED BY MOI !

@iamnaomicampbell @badgalriri @fentyxpuma @puma @pumabyrihanna @oribecanales @reneegarnes #styledbymoi #cerfstyle #CCD (sic)."