Herbie Hancock’s Joni Mitchell cover album, River: The Joni Letters, won the Album of the Year Grammy in 2008 and went to #5 on the Billboard 200. It was his highest-charting album ever, and higher than any actual Joni Mitchell album in over 30 years. Which doesn’t have a whole lot to do with anything, except I like to mention Joni Mitchell as often as possible in these posts. (Hancock also did a Gershwin cover album where Joni sings an absolutely amazing version of “The Man I Love.” For the record, he has also recorded about 1,000 albums that have nothing to do with Mitchell.)

Herbie Hancock AllMusic page