Published Sunday, 18 March 2012
The pop star cooked a birthday meal for her beloved grandmother Dolly Brathwaite at her grandparents' home in Brooklyn, New York and presented her with a special cake.
Rihanna shared the occasion with fans by posting numerous intimate pictures online, including one snap which showed her doing her grandmother's make-up.
She also shared her amusement when her grandfather commented on her ever-changing hair colour, writing in a post on Twitter: "My Grandad: 'Robyn (Rihanna) how ya is get (sic) hair from red to cream to black??? Cuz ya (sic) don't carry wigs!!! Ya does (sic) wash it out?!' Me: ROTFL (rolling on the floor laughing)... (no words)."