John Farnham provided the vocals for many well-known advertising campaigns of the late 1960s and early '70s, including this 1970 advertisement for Fanta soft drink, titled 'Fancy Nancy'.
It's common practice for companies targeting a youth market to borrow images and sounds that have been popular with that demographic. This advertisement is a good example.
It weaves together psychedelic animation sequences and live action with a catchy song. The visuals appear to be heavily influenced by the work of Ron Campbell, who created the animation for The Beatles' feature film Yellow Submarine (1968).