The term 'PURPLE RAIN MUSICIAN' is referring to the late singer-songwriter, Prince. Prince was an American musician who released 39 studio albums and won seven Grammy Awards. He was known for his eclectic work, which spanned a wide range of genres including pop, funk, rock, R&B, new wave, soul, and psychedelia. His most famous album, 'Purple Rain, ' was released in 1984 and featured the hit single of the same name. Prince was a prolific songwriter and performer, and his influence on popular music is still felt today.