Gosh darn you blew it! Secretly I was hoping it was the Lennon/McCartney '67 version of "She's Leaving Vega-Tables".
Sorry to spoil the surprise, but it's a Smile outtake, a prime example of the "humor" aspect
of Brian's album concept, featuring former U.S. ambassador Shirley Temple joining a session
to record an impromptu Wilson brainstorm, "Animal Crackers & Vege-Tables In My Soup".