And the next morning, she was seen looking proud as punch as she left her London hotel hand in hand with her other brother, Rajad, 17.
The Fenty family were heading out of the Capital for RihRih's concert in Birmingham, and were escorted by a huge entourage.
Sibling pal: Rihanna leaves her London Hotel with her brother Rorrey Fenty
She was wearing a pair of dungarees over the top of a black vest that showed off plenty of flesh as she flashed her bra.
Big smiles: Rihanna placed a protective arm around her 17-year old brother Rajad
Rihanna also opted for an interesting beanie hat that featured a veil.
It was very similar to ones previously seen on Alexandra Burke, 24 and Rita Ora, 22.
In fact, it is not the first time Rihanna has opted for one of the unusual hats, which first hit the catwalks last spring.
She has previously been seen in the black version which is studded with pearls, but on Monday opted for Silver Spoon Attire's £80 white version.
Alexandra Burke likes the hat
Rita Ora likes the veiled hat
Rihanna in the veiled hat
The night before she had been supporting her other brother, 23-year old Rorrey, as he rapped at Boujis in London.
Fresh from performing at Twickenham Stadium earlier in the evening, she managed to muster up the energy to head to the club and cheer on her sibling.
Rihanna was joined at the club by her best friend Melissa Forde and British model pal Cara Delevingne, which is sure to have delighted the aspiring rapper.
Cute: Rihanna is close to her younger brothers and often is seen relaxing with them at home in Barbados
Like my hat? Rihanna stepped out in a £80 Silver Spoon Attire beanie hat with veil