Favorite Collaborations

Your favorite collaborations.  Not song writers who compose together (Lennon, McCartney; Becker, Fagen....).
Two or more extraordinary talants who come together to create  extraordinary music.
Some of my favorites
Joe Sample, Randy Crawford
Linda Ronstadt, Nelson Riddle
Johnny Hodges, Billy Strayhorn
Jobim, Sinatra/ Jobim, Gal Costa