"Heart feelin' sad cuz...love's gone bad" What an absolutely great song! The Underdogs actually had another "hit" with "The Man in the Glass" and I saw them perform a few times back in the day. They were a local band here in the Detroit area and performed at all the Artist Music Centers Battle of the Bands in '66 through '69.
Further, I have "Love's Gone Bad" on a Cd called Michigan Memories which includes the finest version ever of "In the Midnight Hour" done by The Wanted. Those were some fun days with truly creative, and hard driving garage bands.