The pair can be seen draped half-naked over one another - taking it in turns to appear topless in the pictures taken for V Magazine.
The singer uploaded the pictures of the two of them in a state of undress to Instagram, giving viewers a teaser glimpse of more to come.
Meanwhile, the 'Diamonds' singer has been entertaining fans on the Victoria's Secret catwalk at their annual lingerie show.
She appeared on stage last night in New York, wowing crowds as she performed live.
The 24-year-old got into the modelling spirit by posting pictures of herself in her dressing room in stockings and suspenders.
She later gave fans an eyeful with a range of photographs backstage with the Victoria's Secret models.
Some of her captions included: "1 big room, full o bad bitches."
And: "#LEGITmodelSh*t I'm a #VS girl now lol."
Justin Bieber and Bruno Mars also featured in the show with models Miranda Kerr, Alessandra Ambrosio and Adriana Lima.
Bruno tweeted: "@Rihanna aka Rih Rih Licious @JustinBieber aka The Biebzenator and ya boy Brunz aka The Sex Dragon up in this biatch! #VictoriaSecretShow."