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15 November 2011, 10:05 | Updated: 15 November 2011, 13:14
The 'You Da One' star treated her brother to a cake and a big night out.
Rihanna took a break from her UK tour to lead celebrations for her brother's 22nd birthday in London.
The 'You Da One' singer was spotted leaving Whisky Mist in the early hours of Monday morning after treating her brother Rorrey to a night out.
In a message on Twitter, Rihanna wrote: "HAPPY BIRTHDAY BRO @RorreyFenty I love u endlessly and I'm so blessed to have a lil bro like u! I'm happy we get to spend ur 22nd 2gether."
RiRi also tweeted again later in the evening to tell her followers how much she had enjoyed their night out.
"What a night!!!!!! Felt like it was MY bday! Its not even my birthday, but he wanna lick the icing off...he want dat CAKE!!!!," she said.
Rorrey recently announced plans to being his own music career with the release his debut single.
Meanwhile, Rihanna continued her 'Loud' tour at London's O2 Arena last night (14th November), as she took to the stage for her fifth of ten gigs at the venue.