Music, like any art, has the potential to inspire such incredibly strong emotion in a person. I think I've only cried once or twice through music. Once was to a yogic chant from musician Jai Uttal. The mantra was "Durga Pahimam" I was so overcome with emotion I started crying in the yoga studio while we were in class xD The second was a song by Imogen Heap.. don't remember the title but it was incredibly powerful as most of her work is.
I've definitely broken down in front of artwork though.