'Imagine' is John Lennon’s most famous solo work, written as a plea for world peace and a world without divisions. Lennon wrote the melody on a Steinway upright piano in his bedroom at Tittenhurst Park. The lyrics were heavily inspired by Yoko Ono’s poetry in her book 'Grapefruit,' particularly her use of the word 'imagine' to envision a better world. In 2017, the National Music Publishers Association officially added Yoko Ono as a co-writer of the song, honoring Lennon's own wish expressed in interviews decades earlier. The song reached number three in the US and number one in the UK (posthumously). It is frequently performed at major global events, including the Olympic Games and New Year’s Eve celebrations. Its simple piano-based arrangement was intended to 'sugarcoat' the radical message of the song to make it more palatable to a mainstream audience.