"Hey There" is a show tune from the musical play The Pajama Game, written by Richard Adler and Jerry Ross.
It was introduced by John Raitt in the original production.
In the show, Sid sings it to a recording device, telling himself that he's foolish to continue his advances to Babe.
He plays the tape back, and after responding to his own comments, sings a duet with himself.
It was subsequently recorded by a number of artists: The song (counting all recorded versions) also reached No.