For me it is "And This is my Beloved" from Kismet sung by Doretta Morrow back in the fifties. Unfortunately, she died in her forties, but her voice lives on on my playlist of Apple Music...
Never heard of her but she also seems to have a great range. I will look her up on iTunes and put her thru my big B&W speakers and see how she stands up to Celine's rendition...
Same song posted by Shan but buy original singer. One of my other favorites not so much love but more heartbreak, but I like even more so, I posted it beneath. Also everything Luther Vandros, and a few other singers.
I loved, loved this song back in the day, she, Lisa Fischer, was a great voice also sang backup for Mick Jagger and others.
My favorite love song is an old western song, Room Full Of Roses, sung by the Sons Of The Pioneers. I think it was recorded in 1949. I must admit Elvis did a great job with, Love Me Tender as well.