I'm confused, didn't know Quincy Jones and Robert Redford where music artists

Quincy Jones is a 90 year old American musical performer, producer, arranger, and composer whose work encompasses virtually all forms of popular music, although he started out as a jazz trumpeter. Throughout the years he's worked with figures from all fields of popular music, including Michael Jackson, Paul McCartney and Aretha Franklin. He was nominated for more than 75 Grammy Awards (winning more than 25) and seven Academy Awards and received an Emmy Award for the theme music he wrote for the television miniseries Roots (1977). In 2013 he was inducted into the Rock and Roll Hall of Fame.
As for Robert Redford - I doubted that too. but "Redford, 79, will make his singing debut on the soundtrack of the upcoming Alec Baldwin–Demi Moore movie “Blind,” directed by Michael Mailer."