This has to be one of the greatest songs ever written and recorded. I get goose bumps every time I listen to it.
Another song that gives me goosebumps: Feeling Good - Michael Buble
I could listen to these two songs forever. I would say the toss up for greatest vocalists are Epica's Simone Simons and Adele. Both just blow me away constantly. Every new release by Epica just floors me. I am also looking forward to Adele's new album which drops soon.