RiRi's Diamond! Rihanna covers baby cousin Majesty in kisses as she takes her to dinner at favourite Italian restaurant

She can dine with any number of world famous stars.

But it appears Rihanna's favourite dinner guest is just a few months old.

The singer cuddled her cousin's baby Majesty as she arrived to Il Ristorante di Giorgio Bald in an unusual black and white coat on Tuesday night.

It was clear Rihanna was devoted to her tiny guest, with the star's ruby red lipstick visible on the baby's much-kissed face.

Despite her tender age, Majesty also joined RiRi at the Grammys on Sunday.

Majesty is the daughter of Rihanna's cousin Noella Alstrom.

The singer frequently shares photo of Majesty on her Instagram account and has dubbed herself 'Aunty OhNaNa'.

 The 26-year-old looked better suited for colder weather in her striking fur coat that was covered in faces.

It was part of a very 'done' look for the star, who had slicked her jet black locks back and layered on both eyeshadow and lippy.

The mini dress she wore was overshadowed by her fluffy black and white coat, as were her pair of sparkling sandal heels.

With her hands deep inside her coat pockets, Rihanna appeared deep in thought as she made her way to the beach side eatery.

The singer, who is no stranger to taking a fashion risk, recently spoke to Harper's Bazaar about her bold taste in style.

The way I dress depends on how I feel. I never have to psych myself up. Usually it just feels like it works,' the Pon de Replay singer revealed.

When quizzed by the publication if there was any specific trend or style she wouldn't allow herself to sport, Rihanna revealed she's not one to follow a fashion rulebook.

'I don't like to commit to those kind of rules. You never know.'

Meanwhile, while Rihanna's pink Grammy frock nabbed spots on both best and worst dressed lists, Rihanna's song The Monster proved to be a hit on Sunday night.

Rihanna and her The Monster collaborator Eminem scooped up Best Rap/Sung Collaboration at the Grammy's pre-ceremony.

She then took to the stage for her debut performance of Four Five Seconds, a collaboration with Paul McCartney and Kanye West.

Rihanna was clearly over the moon with the performance and tweeted on Sunday night: 'What a night! Still can't believe we @kanyewest shared a stage with a f***ing BEATLE tonight! #bucketlistsh** Thank you Sir @PaulMcCartney'.