Joni Mitchell celebrated her 75th birthday in style last November, as Jörn Weisbrodt and The Music Center in Los Angeles hosted a pair of star-studded Joni 75: A Birthday Celebration concerts in her honor. The line-up (which Joni helped select) featured many of her closest friends and dearest collaborators, including Graham Nash, Seal, Chaka Khan, Kris Kristofferson, and James Taylor. Also on the bill were Diana Krall, Brandi Carlile, Rufus Wainwright, Emmylou Harris, Glen Hansard, Norah
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