"Sunshine Superman" reached the top of the "Billboard" Hot 100 in the United States, and subsequently became the title track of Donovan's third album, "Sunshine Superman". Chart positions were No. 1 (US), and No. 2 (UK) (the single was released in December 1966 in the UK). It was Donovan's only single to reach No. 1 on Billboard's Hot 100. A different mix of "The Trip" (without harmonica) is also included in the album. It was the first product from the highly successful three-year collaboration between Donovan and producer Mickie Most and is generally considered to be one of the first examples of the musical genre that came to be known as psychedelia. The song features styles of psychedelic pop, folk rock, psychedelic folk, and psychedelic rock.