She may well be a megastar, indeed - she was recently recognised as one of Time's Most Influential People in the world - but to Rajad Fenty Rihanna is just his big sister.
And the 24-year-old singer showed just how normal their relationship is when she tweeted a picture of the pair of them larking around.
The 13-year-old is grinning as he pins the Umbrella singer to floor, just like any mischievous little sibling would do.
Rihanna is close to both her younger brothers, she also has Rorrey, who is 21. The singer, who made her acting debut with Battleship, has landed another role on the big screen.
