I don't mean just great ones, I mean magnificent ones.

For me, I'd have to say it is Eva Cassidy's rendition of Over The Rainbow. I swear, that is one helluva gift she left humankind. It gives me chillbumps every single time. First time I played the CD, I had to pull over, I had tears in my eyes and it still does that to me. It is truly stunning. The arrangement is incredible, her voice is that of an angel and it is a magnificent song. She has many incredible recordings. Wow, music is so powerful. May she rest in peace.