20 Al Jarreau Amy Grant Bette Midler Buddy Guy Cyndi Lauper Dan Fogelberg David Bowie David Cassidy Donny Hathaway Eric Clapton George Harrison Gregg Allman Gypsy I Wish J. J. Cale James Taylor Jimmy Buffett Joe Walsh John Mayer John Scofield Keb' Mo' Kenny Rogers LeAnn Rimes Leon and Mary Russell Mark Ronson Pam Tillis Randy Newman Robert Cray Rod Stewart Ronnie Wood Steve Winwood The Gregg Allman Band The Miracles The Rolling Stones Vince Gill Wynonna Judd