Rihanna Cooks A Delicious Birthday Dinner For Her Grandma

Before playing chef at her grandmother Clara's birthday dinner last night, we spotted Rihanna stopping by Whole Foods in NYC to stock up on a few last-minute essentials.

As always, R&B starlet posted a ton of photos on her Twitter page over the course of the evening, and it looks like her grandparents are just as fun and easygoing as she is! Clara struck a few poses for RiRi in a baseball hat and sunglasses, and the trio appeared to be sipping on champagne.

While Rihanna's family is obviously super chill, that doesn't mean that her grandfather Lionel isn't puzzled by her constantly changing hairstyles! RiRi tweeted earlier, "My GranDad: Robyn how ya is get hair from red to cream to black??? Cuz ya don't carry wigs!!! Ya does wash it out?! ME: ROTFL. No words." LOL!