The Woods Are Full of Cuckoos (1937)

The Woods Are Full Of Cuckoos is a Merrie Melodie cartoon directed by Frank Tashlin, and released in December 1937. It is a parody/send-up of several different radio programs of the era, particularly the then-popular "community sing" programs. Author and critic Alexander Woollcott is parodied as Owl Kott in the cartoon, a parody that Tashlin would revisit in Have You Got Any Castles? (1938). This is the very first cartoon to use the orange-yellow color scheme for the Merrie Melodies opening rings.

More at Wikipedia.