Done in the 1940's o 1950's - Harmonized type of song - "You don's need analyzing; cause it's not so surprising that you feel very strange but nice; your heart goes pitter-patter, I know just what's the matter because I been there once or twice;put your head on my shoulder, you need someone whose older, a rub down with a velvet touch, there ain't nothing you can take to relieve that pleasant ache - you're not sick - your's just in love." Other part of sing starts with "I hear singing and there is no one there, etc. " Both parts are sung at the same time. I am looking for the title and author if anyone has any info on this.

I love this one. Written by Irving Berlin and published in 1950, it was first performed by Ethel Merman and Russell Nype in the musical comedy, "Call Me Madam".
Here is Perry Como and The Fontane Sisters performing this timeless tune.

Perry Como: You're Just In Love (http://www.youtube.com/watch?v=jrXFXmKI1Dc&feature=related)

You're Just In Love: Wikipedia (http://en.wikipedia.org/wiki/You're_Just_in_Love)