We Five - my all-time favorite. 1965.
The guitar licks were ahead of their time too.
I have the original on vinyl, performed by Richard and Sylvia.
(I think they wrote it)
How about Red Rubber Ball as a OHW?
Red Rubber Ball doesn’t qualify as a one-hit wonder. The Cyrkle also had Top 40 hit with Turn Down Day in 1966, the same year that Red Rubber Ball hit the Top 40.