It's the Weekend!
I came across mention of this bit while searching reviews of Conan O'Brien's new TBS show. This clip is from Conan's old NBC show, & is part of his reaction to the writers' strike:
... Naturally, the original vid was unavailable on NBC & YouTube, so the site where I finally dug it up explained it like so: "Conan O'Brien, faute de writers, décide de chanter une chanson d'Elvis pour divertir son public...et il le fait plutôt bien." I liked that even better. ...
... A friend writes, "I can never hear that song without chuckling at the fact that Bill Monroe was so miffed that Elvis covered his song at such an up-tempo, that he re-recorded Blue Moon of Kentucky and set the metronome just a tad faster than even Elvis' version. I guess that showed him who was boss!" So here's Bill Monroe singing it the way he writ it & in its up-tempo incarnation:
But Elvis did know how to sing it Bill Monroe's way (played over various early Elvis clips):
And here's the version you'll remember, recorded at Sun Records in 1954: