Approximately Infinite Universe is a double album by Yoko Ono, released in early 1973 on Apple Records. It represents a departure from the experimental avant garde rock of her first two albums towards a more conventional pop/rock sound, while also dabbling in feminist rock. It peaked at number 193 in the United States. Ono produced the album with John Lennon, whose participation marked a rare music-related activity for him after the failure of the couple’s politically themed Some Time in New York City. Lennon also sang the final verse of the song, “I Want My Love to Rest Tonight.” As on the latter album, Ono used the New York band Elephant’s Memory as her backing musicians.