There was a conscious effort from Tracee Ellis Ross and The High Note filmmakers to avoid the diva character having similarities to Diana Ross. Ross made sure when her hair was done, it didn’t channel The Supremes singer. The High Note’s director, Nisha Ganatra, said the film used Janet Jackson, Whitney Houston, Beyoncé, Alicia Keys, Madonna and Tina Turner as references, but not Diana Ross.
Article source: https://www.cinemablend.com/news/2547226/despite-questions-tracee-ellis-ross-says-her-her-high-note-character-is-not-based-on-her-famous-mother