Mary Wilson, a founding member of the legendary Motown singing group “The Supremes,” has died. She was 76. Her cause of death has not been released. Wilson, alongside Diana Ross and Florence Ballard, skyrocketed to fame in the 1960s to become America’s most successful and best-charting vocal group of all time. In recent years, Wilson carried the torch for the group. She spoke of her storied life with Inside Edition in 2006.“I'm glad I’m Mary Wilson. I wouldn't want to be anyone else,” she said.