Posing without make-up, RiRi looks upset and exhausted in the self-portrait, which she captioned with an apology to her beloved late grandmother Clara "Dolly" Braithwaite.
Dolly died of cancer at a New York hospital on July 1 this year.
Thankfully, the 24-year-old ditched the beer and cleaned herself up for the funeral service, dressing in a modest black shift to mourn her beloved gran.
She also put on a brave face to perform at London's Wireless Festival over the weekend.
RiRi and her grandma were reportedly very close, with the singer posting intimate pics
of the two of them spending time together in hospital while Dolly was sick.