Johnny Mercer was a classic songwriter. It's interesting to compare Fred Astaire to Dean Martin, the different takes on the song. Fred is surprisingly dark with his take, and Dean is, well, Dean. The guy ALWAYS looked like he was having fun. No breaking champagne glasses for him.
The Astaire clip has about 4 minutes of his film, superfluous for this comparison, but the best clip I could find.
I wasn't around when these songs, these versions, were released. But I still feel a pang, realizing that they are slowly slipping away. And by 'they' I mean all of these songs that were before our time. The obsession with 'what's next' at the expense of what came before is a crime.