Rihanna recently lost her grandmother Dolly to cancer, and while it's understandable that the 24-year-old singer is sad, drinking might not be the best way to cope with her troubles! Er, maybe it's just root beer in the bottle?

Despite rocking the stage at the Wireless Festival in London's Hyde Park over the weekend, after attending her grandmother's funeral today in Barbados, Rihanna is still showing the strain of losing her beloved relative.

Riri wrote, "I had to!!! Sorry granny", and as far as figuring out the meaning behind her caption, your guess is as good as ours...