Irving Berlin: What'll I do

A year or so ago, I watched a PBS program on Irving Berlin, and I was absolutely impressed with the man. I mean, I was familiar with a few--very few--of his works. That is all. I had no idea about Berlin as a person, as an American, as a Jew, as an immigrant, .... and it was just awesome. I think it is truly an American story that an immigrant Jew would be the composer for very many beloved songs, like God Bless America, White Christmas, ....
Here is one of my favorites--the best of the YouTube clips I could find. There is a prelude of sorts to the song:

Gone is the romance that was so divine.
'Tis broken and cannot be mended.
You must go your way,
And I must go mine.
But now that our love dreams have ended...