OK, let's go WAY back: This 1931 classic was written by Tin Pan Alley composer Herman Hupfeld. He wrote both music and lyrics - unusual at the time - most songs then were collaborations. Written for the musical "Everybody's Welcome". Sung by Dooley Wilson with Elliot Carpenter on piano in "Casablanca" ('42). Re-released by Rudy Vallee in '42 (#1). AFI's #2 Top Movie Song (2nd to "Over The Rainbow").
Yesterday's answer: "Shout" by The Isley Brothers. Now, waaaaaaaaaaaait a minute! Marvin Isley, younger brother of the original 3, helped the group segue into 70's funk. He died last week at the age of 56.