Stevie Wonder-"Songs In The Key Of Life" (1976)

With "Songs In The Key Of Life" Stevie Wonder closed the trilogy started with "Innervisions" from 1973 and "Fulfillingness' First Finale" from 1974, undoubtedly one of his best creative stages and where he would begin to control his productions personally far from your label guidelines.
For this new job Wonder made his Motown record company wait two years before delivering the material for publication, the patience of the label's directors would be rewarded by the most ambitious and successful project that the musician had done up to that moment.
"Songs In The Key Of Life" was a double album thanks to the large number of songs that Stevie Wonder had composed during those two long years.
The album went straight to number one in the top 100, never before has an American artist accomplished such a feat, and spent 14 weeks at the top, in addition to obtaining three Grammy awards, for best album, best production and best vocal performance.
You only have to listen to the metal introduction of "Sir Duke" dedicated to Duke Ellington, to realize where the harmonies and musical resources of the funky singers of the following years come from, such as the Jackson Five or Earth Wind & Fire.
Stevie Wonder would achieve here the intrinsic quality of the songs and a new direction of great wealth in arrangements and instrumentation that his music possessed, with an outstanding album.