#223 John Lennon, 'Imagine' (1971)
The opening chords on this record have got to be amongst the most famous ever played on record. Even the most casual music listener, no matter their age (almost) will be able to identify the song after about 1-2 seconds in. After having written and recorded some of the most recognisable music of the ‘60s (and what would become of all time), Lennon wrote an anthem for the Human Race.