Joni Mitchell's Stunning Rendition of "Summertime" at Gershwin Prize Concert.

Joni Mitchell was honored with the Library of Congress’ Gershwin Prize for Popular Song at a tribute concert in Washington, D.C. The concert featured performances by an array of music legends, including James Taylor, Brandi Carlile, Annie Lennox, Herbie Hancock, Cyndi Lauper, Marcus Mumford, Graham Nash, Diana Krall, Angelique Kidjo, and Ledisi. Mitchell performed a cover of George Gershwin’s “Summertime” and showcased her visual art on the concert stage. The concert will air on PBS on March 31. Mitchell is only the third artist born outside of the U.S. to receive the Gershwin Prize and the third female artist to receive the honor.