20. Grace Slick 19. Etta James 18. Gladys Knight 17. Chaka Khan 16. The Supremes 15. Patti Smith 14. Stevie Nicks 13. Ella Fitzgerald 12. Debbie Harry 11. Patsy Cline 10. Carole King 9. Annie Lennox 8. Madonna 7. Chrissie Hynde 6. Billie Holiday 5. Joni Mitchell 4. Bonnie Raitt 3. Janis Joplin 2. Tina Turner 1. Aretha Franklin