'The only talking cartoons I remember from 1949-1950 were on WABD where PAT MEIKLE and BIG BROTHER BOB EMORY shared them, all 3 of them. They were as follows:

1. Happy elves sang "Sunshine, sunshine, I just love the good old golden sunshine" until the mean guys came along and sang "We're happy when we're sad; we're always feeling bad" and squirted black stuff all over everybody and made them sad. The elves struck back and shot bottled sunshine at the bad guys who now sang "We're gonna be happy and gay and never again be gray."'

from here.