Clara Braithwaite Dies: Rihanna's Grandmother Passes Away

Rihanna's grandmother, Clara "Dolly" Braithwaite, has died after battling cancer, according to Contact Music.

"Goodbye #grangranDOLLY get your beauty rest until I see you," the singer tweeted early Sunday morning , followed by numerous photo postings of her grandmother.

Chris Brown's mother, Joyce Hawkins, also offered her condolences to her son's ex-girlfriend via the social networking site. Rihanna responded: "@mombreezy thank you! Love u mama."

Many are speculating that the passing of her grandmother was is to blame for Rihanna's Saturday subpar performance in Sweden -- she accidentally dedicated a song to Norway after taking the stage 45 minutes late .

But since the news of Braithwaite's passing, Rihanna's fans have taken to Twitter to show their support for the grieving singer.