Bonnie Raitt's pioneering ‘70s recordings made major headway for women in blues, so it's a no-brainer that Sue Foley's grease and growl and Susan Tedeschi's soulful moan owe something to Raitt's influence. But with an oeuvre that spans so many genres, she's also made an impact on the stark indie folk of Bon Iver, the gently jazzy pop of Norah Jones, and the country sway of Wynonna Judd.