None of the other version use both the Em to Am soft combo in the second line of the verses and the B7 to C combo in the choruses. Some of these chords have been simplified from Norah's version. Again, learn this basic version, then start substituting more add9th's and sus2's and such. Listen to the video and experiment. Hopefully a good tab writer will tab Bonnie Raitt's slide solo. Guys might want to do this in C. Use major, not minor, pentatonic scales for fill-in and solo's.