Originally Posted by Wikipedia

Psychedelic pop is a psychedelic musical style inspired by the sounds of psychedelic folk and psychedelic rock, but applied to a pop music setting. It reached its peak in the last years of the 1960s, declining rapidly in the early 1970s.

Origins and characteristics

The origins of psychedelic music were in folk and rock music of the mid-1960s, particularly the work of The Beatles, The Byrds and bands like The Yardbirds and The Grateful Dead.[1] As psychedelia emerged as a mainstream and commercial force it began to influence pop music, which incorporated hippie fashions, drug references, as well as the sounds of sitars, fuzz guitars, and tape effects, but often using the close harmonies of the California sound and applying these elements to concise and catchy pop songs.[2]