Smokey Robinson Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Yo-Yo Ma offered a graciously warm performance of Tchaikovsky's Andante Cantabile for cello and strings with student musicians. Hilary Scott/courtesy of the Boston Symphony Orchestra hide caption

itoggle caption Hilary Scott/courtesy of the Boston Symphony Orchestra

Joni Mitchell strums her guitar outside the Revolution club in London, circa 1968.

Central Press/Getty Images hide caption

itoggle caption Central Press/Getty Images

James Taylor and Carole King first collaborated 40 years ago and are now reunited for a joint tour. James O'Mara hide caption

itoggle caption James O'Mara