*Rihanna was back in the hospital over the weekend – but this time she was visiting her grandmother Clara “Dolly” Brathwaite, who is battling cancer.

The singer, reportedly the spark that sent bottles flying between the camps of Chris Brown and Drake last week, spent Father’s Day enjoying quality time with her beloved “Gran Gran Dolly” at a Brooklyn hospital.

“My heart smiled and cried all at once,” she tweeted, along with playful photos at her grandmother’s bedside.