Have just found this thread/discussion. Yes, songs and music can bring on the tears and now I let this happen. I no longer care if people see me getting in touch with my feelings. Music is a very potent trigger for the emotions, whether they be good or bad, but it's no shame to let them show because we show our humanity along with them.
The choir I sing with learned "Someone like you" and we were encouraged to connect with our feelings of love lost in order to perform it more convincingly. At first I couldn't sing it without blubbing, tears streaming down my face. But once I'd done this a few times & I could sing through the tears, they went away, leaving the emotional connection in place.
The song that really gets to me even now if it's played on the radio is "Clare" by Gilbert O'Sullivan. This was the name of my baby who lived for 9 days before we lost her, and 40 years on, this song still hits me hard.