The Holy Mackerel was a Los Angeles-based psychedelic pop band formed in 1968, fronted by singer-songwriter Paul Williams. The group released a self-titled album that year, blending folk, country rock, and psychedelia. Despite its initial commercial underperformance, the album has since been recognized as a cult classic. Williams later achieved fame for penning hits like "We've Only Just Begun" and "Evergreen." ([en.wikipedia.org](https://en.wikipedia.org/wiki/The_Holy_Mackerel?utm_source=openai))