Rihanna's beloved grandmother, Ciara "Dolly" Brathwaite, has lost her battle with cancer. The We Found Love singer took to her Twitter account to share the tragic news and honor her grandmother, who she called "gran gran Dolly" in a series of instagram post, GossipCop reports.

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After her grandmother's passing on Saturday, Rihanna tweeted, "Goodbye #grangranDOLLY get your beauty rest until I see you." She also posted about a dozen or so pics of her grandmother. In addition to Rihanna's postings, a couple other celebs tweeting their condolences as well, including Chris Brown.

Chris tweeted, "Praying for family and the lost loved one. She was like my grandmother. Love you GRAN GRAN! RIP." And Brown's mom Joyce Hawkins tweeted, "@rihanna ANGEL MAY GOD BE WITH YOU AND YOUR FAMILY IN YOUR TIME OF SORROW. LOVE YOU ANGEL."

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As much harm as Chris has caused Rihanna, it's very thoughtful of him to acknowledge her grandmother's passing.

What do you think?

Photos courtesy of Twitter