The death of Joni Sledge was tragic. The Sister Sledge singer was just 60 when she died and now a cause of death has emerged.

According to her sister Kim, who spoke to the New York Daily News on Friday (March 17), Joni died of natural causes.

“It was a shock to all of us,” Kim said. “We believe that God just took her home. She led a good clean life. It was natural causes.

“I think it was just Joni’s time to go too,” she continued. “She’s with our mom, and we feel the peace of that.”

Kim also revealed that the band, sans Joni, was slated to perform at the Cypress Bayou Casino in Charenton, Louisiana tonight and that she and other sister (who's still a part of the group) Debbie still planned to perform in order to celebrate Joni’s legacy.

“We know she’ll be on that stage with us. We really are that close,” Kim explained. “I’m actually kind of relieved. It will be good to sing because singing is something we do that’s healing. We can sing her favorites. We might even sing some new material she wrote. I think it’s just going to be a concert where we love on each other.”

Joni Sledge passed away on Friday (March 10) at her home in Phoenix, Arizona. She was found unresponsive and at the time, her cause of death had yet to be determined.