A while back a friend of mine sent me a link to a youtube video. When the video began to play and I saw a bunch of old people sitting on a stage, I thought “Oh geez… she videotaped her grandpa’s senior’s home Christmas concert?!” and I nearly turned it off. …but as my mouse slid toward the “x”, that group of old people began to sing and I was completely, utterly and wholly blown away. I spent the next hour watching every clip I could find on Young @ Heart, a New England Senior Citizen’s Chorus (who have become so famous that a feature film has been made about…