It's from the film "Waikiki Wedding": https://www.youtube.com/watch?v=y4vKzs0G3E4

And here's Elvis's version: http://www.youtube.com/watch?v=cyIJ2vMIuDg

Close your eyes, listen and tell me, which do you like better? It's a hard comparison because Bing's version is from an old monaural recording and he had a bass-baritone voice, while Elvis's is a more modern stereo version and, although he had a three-octave range, his usual range was tenor-baritone. But please let me know what you think. I'd be especially interested in the opinions of professional singers, but this board isn't very busy, so anyone's opinion is fine.