that's why i call you my, baby (also the word "mountain")

the sound is a mix of pop music and some sort of swing or very soft rock.
its a happy sounding love song, which went public between the 70's and 90's (sorry for the poor specification).
the vocalist is male and (as far as i remember) without any features.
the word "baby" is protracted/long-drawn (i'm also sorry for my poor english skills)

instead of "that's why i call you my, baby" it could also be "thats why you are my, baby"

according to the sound of the voice, the vocalist may be white. does anyone remember it?