Stevie Wonder

This first single was actually one of the last things added to 'Songs in the Key of Life.'

Album also includes singer's late father, Edward Severson Jr.

Gospel-flavored track appears on John's upcoming collaborative LP 'The Lockdown Sessions.'

He didn't have to prove anything by this point, but he doubled down on his legend anyway.

A song he cowrote, the first original to be released as a single, turned his fortunes.

His legacy-securing streak of five milestone albums between 1972-76 didn't come out of nowhere.

Synth pioneer influenced music throughout the '70s and '80s.

The 1970 hit single marked a major career turning point for the artist.

Legend says "I was definitely in a much better spiritual place" during four-day coma.

This very adult LP was where the former child star became a man in full.