Stevie Wonder performs in June 2010 at the Glastonbury Festival in Glastonbury, England. His Grammy-winning album “Innervisions” turns 50 this year. (Photo by Ian Gavan/Getty Images) ...

Stevie Wonder performs in June 2010 at the Glastonbury Festival in Glastonbury, England. His Grammy-winning album “Innervisions” turns 50 this year. (Photo by Ian Gavan/Getty Images) ...

This August, two legendary albums, Stevie Wonder’s “Innervisions” and Marvin Gaye’s “Let’s Get It On,” celebrate their 50th anniversaries. These transformative LPs come from Motown ...

Stevie Wonder ’s breakout as a ... Innervisions,” 1974’s “Fulfillingness’ First Finale” and 1976’s “Songs in the Key of Life,” three of which won Grammys for Album of the Year ...