‘It Happened to Jane’ (1959) starred Jack Lemmon and Doris Day. It’s an O.K. movie (Ernie Kovaks is the villain).
This clip is a little long , but watch the first part.
Note the reasonably realistic, chaotic group of Cub Scouts. Doris singing ‘Be Prepared’ as Jack strums the ukulele on backup. As a youngster I would have been a worshipful, attentive and enthusiastic singer if the lovely Ms. Day showed up at my cook out.