Here's a bit about the origins of the song from https://www.definitions.net/definition/cara%20mia:

"Cara Mia" is a popular song published in 1954 that became a UK number 1 and US number 10 hit for English singer David Whitfield in 1954 and a #4 hit for the American pop group Jay and the Americans in 1965. Jay & The Americans' version went into the charts in the Netherlands when it was re-released in 1980. The title means "my beloved" in Italian.

My Great Song Thesaurus says words and music were by Trulio Tranpani and Lee Lange, 1954. Was it first written in Italian? Not much in Wikipedia.

-Joe-

Here's a recent performance of the song by Jay Black, formerly of Jay and the Americans: https://www.youtube.com/watch?v=9oFW6rmtUXY
Apparently, there's disagreement about who the Jay in Jay and the Americans should be. I think there have been three of them, and all three are pretty good at singing falsetto. Here's another: https://www.youtube.com/watch?v=p_VAOjzjhn0.