Sounds like the old Nat King Cole classic:-
Stay as sweet as you are,
Don't let a thing ever change you.
Stay as sweet as you are,
Don't let a soul rearrange you.
Don't ever lose all the charm you possess,
Your loveliness darling,
the way you say "yes."
Stay as sweet as you are,
Discreet as you are--you're divine dear.
Stay as grand as you are
And as you are, tell me that you're mine, dear.
Young and gay or old and gay
Near to me or afar.
Night and day I pray
That you'll always stay as sweet as you are.
Don't know of a version by a female singer, although maybe his daughter Natalie Cole has recorded it?