Regarding the 'sweet potatoes' that
Gary Cooper and
Walter Brennan play, in addition to "Hi Diddle Dee Dee (An Actor's Life For Me)", from "Pinocchio": Brennan alone plays this on an ocarina (sweet potato), but Cooper plays a small harmonica. The tune they play as a duet, while
Barbara Stanwyck is interviewing them, is The "William Tell Overture, Finale" by Rossini (The Lone Ranger Theme). Cooper explains the reason Brennan likes him is that they both play 'Doohickeys'.
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