Joni Sledge, who recorded the dance anthem We Are Family with her three sisters, has died aged 60.

Sledge was discovered dead at her home in Phoenix, Arizona by a friend on Friday, the band’s publicist said.

A cause of death has not been established.

“On yesterday, numbness fell upon our family. We welcome your prayers as we weep the loss of our sister, mother, aunt, niece and cousin,” the family said in a statement.

Sledge and her sisters Debbie, Kim and Kathy formed Sister Sledge in 1971, and had their breakout success with We Are Family in 1979.

The dance song became an anthem of unity and women’s empowerment.

Sledge is survived by a son, as well as her sisters and other relatives.

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