Short answers, pulled from the story.
"Instant Karma!" was released on the 6th of February 1970 in Britain and on the 20th of February 1970 in the United States. It was written, recorded, and released within ten days, making it one of the fastest-released songs in pop music history.
"Instant Karma!" was produced by Phil Spector, marking his return to the studio after a self-imposed retirement following the 1966 commercial failure of Ike and Tina Turner's "River Deep - Mountain High" in America. The session took place at EMI Studios in London on the evening of the 27th of January 1970.
The musicians on "Instant Karma!" were John Lennon, George Harrison, Klaus Voormann, Alan White, and Billy Preston, all of whom had performed together at the December 1969 Peace for Christmas Concert. Mal Evans added chimes, Allen Klein and a group of strangers brought in from a nearby nightclub contributed backing vocals, and Harrison directed the chorus singing.
Stephen King took the title of his 1977 horror novel The Shining from Lennon's chorus line "We all shine on." King had originally planned to call the book The Shine, but changed it after realising that "shine" had been used as a derogatory term for Black people.
"Instant Karma!" reached number 3 on America's Billboard Hot 100, number 2 in Canada, and number 5 on the UK Singles Chart. It became the first solo Beatle single to sell one million copies in the United States, earning RIAA gold certification on the 14th of December 1970.
Cover versions of "Instant Karma!" have been recorded by Paul Weller, Duran Duran, Toad the Wet Sprocket, Tokio Hotel, and U2, whose version appeared on Amnesty International's 2007 compilation Instant Karma: The Amnesty International Campaign to Save Darfur. In 2022, the group Bleachers covered the song for the soundtrack of the animated film Minions: The Rise of Gru.