For me, it has to be this, especially Chet Baker's version from the 1940s :
"I get along without you very well,
Of course I do,
Except to hear your name,
Or someone 's laugh that is the same....."
And the last lines:
"Except perhaps in Spring,
But I should never think of Spring,
For that would surely break my heart in two..."
It gets me every time! What song do you find beautiful?