First recorded by The Fleetwoods (1964).
Hit version by Chad & Jeremy (US #17/MOR #4 1965).
From the wiki: “‘Before and After’ was written in 1964 by Van McCoy (‘Baby I’m Yours‘, ‘The Hustle’), then a staff writer for Columbia Record’s publishing arm April Blackwood Music. The song borrowed the concept of ‘before and after’ images then popular in advertising campaigns for weight loss products: the song’s narrator compares his image with that of the current beau of his ex-girlfriend: ‘He wears a smile, I wear a frown…See the difference between the old and new/ Before and after losing you.’
“‘Before and After’ was first recorded by The Fleetwoods (‘Come Softly to Me’) in late 1964, and released in January 1965 as the title track for their album Before and After. Released as a single in February 1965, it had no apparent chart impact. UK singing duo Chad & Jeremy released a cover in May 1965 as the group’s label debut for Columbia Records after leaving World Artist Records. Its chart impact muted by the concurrent release of other Chad & Jeremy singles by the duo’s previous label, peaking at #17 on Billboard Hot 100, and proved to be the duo’s fourth but final Top-40 hit.”
Chad & Jeremy, “Before and After” (1965):