Don't change your hair for me
Not if you care for me
Stay little valentine, stay
Each day is Valentine's Day
My Funny Valentine from the 1937 Broadway show Babes In Arms, written by Richard Rodgers and Lorenz Hart. Here are two very different covers of the song.
Frank Sinatra from the 1950s (the girl is his daughter, Nancy Jr)
This is Elvis Costello's version from 1978. It has a more chilling tone.