San Francisco (Be Sure To Wear Flowers In Your Hair), penned by Phillips and featuring him on guitar, was McKenzie's only significant hit.

Inspired by the first Monterey Pop Festival, which organised by Phillips and Lou Adler, among others, it was reportedly recorded with McKenzie wearing a flower garland and friends gathered on the floor to meditate.

It soared to the number four spot in the US Billboard 100, and number one in the U