First recorded by The Ever-Green Blues (1967).
Hit version by The Grass Roots (US #5 1968).
From the wiki: “‘Midnight Confessions’ was written by Lou T. Josie and originally recorded by the Ever-Green Blues in 1967 for their album 7 Do Eleven (because The Ever-Green Blues were a 7-piece band doing eleven songs). Their recording caught the attention of producer Steve Barri who was looking for a song for The Grass Roots to record that was a ‘West Coast’ approximation of a Motown-style production.
“Because of the way The Grass Roots was handled by its producers, it is unlikely that any of the members of the band actually played on their recording of ‘Midnight Confessions’ (members of The Wrecking Crew did) except to provide the vocals and to perform it in concert. Regardless, it was the Grass Roots’ first single to feature a horn section and was a departure from the group’s previous singles and thus caused worry for the band members that it might not have become a hit. The Grass Roots, however, did not need to worry as the single became their biggest hit in the United States, peaking at #5 on the Billboard Hot 100.”