"Lucy in the Sky with Diamonds" is a song by the English rock band the Beatles from their 1967 album Sgt. Pepper's Lonely Hearts Club Band. It was written primarily by John Lennon and credited to the LennonMcCartney songwriting partnership. Lennon's son Julian inspired the song with a nursery school drawing that he called "Lucy in the sky with diamonds". Shortly before the album's release, speculation arose that the first letter of each of the nouns in the title intentionally spelled "LSD", the initialism commonly used for the hallucinogenic drug lysergic acid diethylamide. Lennon repeatedly denied that he had intended it as a drug song, and attributed the song's fantastical imagery to his reading of Lewis Carroll's Alice in Wonderland books.The Beatles recorded "Lucy in the Sky with Diamonds" in March 1967. Adding to the song's ethereal qualities, the musical arrangement includes a Lowrey organ part heavily treated with studio effects, and a drone provided by an Indian tambura. The song has been recognised as a key work in the psychedelic genre. Among its many cover versions, a 1974 recording by Elton John with a guest appearance by Lennon was a number 1 hit in the US and Canada.

Donald Carl Johanson (born June 28, 1943) is an American paleoanthropologist. He is known for discovering, with Yves Coppens and Maurice Taieb, the fossil of a female hominin australopithecine known as "Lucy" in the Afar Triangle region of Hadar, Ethiopia.