Various thoughts on the discussion:
1 - "Hung on You" is not hard to find on 45. It was a surprisingly failed A-side following the two classic Philles hits, but some DJ's flipped it, and the semi-throwaway B-side, a 50's retread they didn't even bother to have Bill Medley sing on, did OK. That was "Unchained Melody".
2 - The climax of "Just Once in My Life" ("I Can't Give You The World" etc.) is probably the most goosebump-inspiring moment in all of music for me.
3 - I am constantly shocked at how "otherworldly" a lot of 50's records sound. Check out something like Bobby Freeman's "Do You Want to Dance" on youtube.