“Tu vuò fà l'americano” (you want to act American) is a comic song in Neapolitan about a young man in post-war Naples who copies everything American: he wears a baseball cap, drinks whisky and soda, dances rock and roll, smokes American cigarettes — but it's his mother who pays for it all, and how is he going to woo a local girl when he can't even speak properly?
Renato Carosone released it in 1956 and it became an international swing classic, later used in films and in a famous electro-swing remix.
The lyrics are in Neapolitan, a language close to Italian but different, so it's B1: “vuò fà” is Italian “vuoi fare”. Learn a few Neapolitan words and the joke becomes clear.