It ain't the looks, it ain't the voice, it ain't the ethnicity, it's the SOUL. You either got it or you don't. And if you can't feel it or recognize it, you're missing a big part of the life experience. Sometimes it's inhibited by social and cultural barriers and the requirement to be emotionally 'exposed'. It's found most often in 'church' music and various types of 'folk' music (Blues, Gospel, Celtic, etc.) but can be heard (felt) in nearly ALL musical forms.
The tune below is done by one of my all time favorite singers and sort of demonstrates everything I've said above. It's not always the song (although a good song helps) but is more about the presentation. Some (musicians) may find the SAX on this tune 'gratuitous', but I think it's perfect within this arrangement. What do you think?
https://www.youtube.com/watch?v=axcXYkiO82Q&nohtml5=Falsechas