Before gifted singers-songwriters such as Mariah Carey, Ariana Grande, SZA and Lalah Hathaway were murmurs in anyone’s ears, there was Minnie Riperton.

Graced with an extraordinary five-and-a-half-octave vocal range, including the whistle register — the highest for a human voice — the Chicago native and her musical legacy are the focus of a special tribute taking place at Los Angeles’ Hollywood Bowl on Wednesday evening (Sept. 24) that now boasts the just-announced addition of Stevie Wonder.

“Perfect Angel: The Definitive Minnie Riperton Tribute” salutes the 50th anniversary of Riperton’s same-titled 1974 major-label album debut as well as encompass the expansive, multi-genre scope of a colorful career tragically cut short when she died of breast cancer at age 31 in 1979. Aside from Wond

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