The singer has already pulled out of the Rock Rio festival this week after her Gran Gran Dolly lost her battle with cancer.
Devastated by the news, she was pictured boarding a plane yesterday to go and be with her mum.
She tweeted ‘Coming home to squeeze ya mama’.
Fans have taken to Twitter to offer their support to Rihanna and her family, as the singer posted touching pictures of her grandmother.
Rihanna was due to headline the festival in London’s Hyde Park this Sunday night, and currently the organisers have confirmed she is still set to play.
Wireless will be the first performance since fans blasted the singer for appearing drunk at her concert in Sweden, hours after she received the news.
It is yet to be confirmed whether Rihanna will take some time off from her hectic schedule.