The new Annie Lenox album has a song titled "The Saddest Song I've Got" and it really is.
Otherwise, Sarah McLachlan "Hold On" breaks me, knowing that it's about somebody watching their spouse die and preparing for the moment when they need to let go.
Johnny Cash's "Hurt" is really poignant.
"Turn and Run" used to make me cry, I don't like it anymore. Funny, because there are only a NF few songs I have started liking less as time goes on, usually it's the opposite.
And I think I was conditioned to cry when I heard the SSB because of the intensity of the moments when I used to usually hear it, Gold Medal victories at the Olympic Games & at the beginning of professional sports games. Now, of course, it resonates emotionally for truly patriotic reasons, regardless of the quality of the tune or the performance.
In general, grief and heartbreak are the tearjerker themes. Let's not even discuss musical theatre and opera please.