To celebrate Mitchell 's 70th birthday , the 2013 Luminato Festival in Toronto held a set of tribute concerts entitled '' Joni : A Portrait in Song – A Birthday Happening Live '' at Massey Hall on June 18 and 19 . Performers included Rufus Wainwright , Herbie Hancock , Esperanza Spalding , and rare performances by Mitchell herself
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Luminato
Joni Mitchell