SKY is a notable work by Yoko Ono, and alongside Wish Tree for Washington, DC it forms part of the body of work for which she is recognized as an artist, musician, activist, filmmaker, and conceptual artist.

Ono was born on February 18, 1933, in Tokyo, and holds citizenship in both Japan and the United States. She studied at Gakushuin University and has worked in both English and Japanese throughout her career. Her practice spans an unusually wide range of disciplines: she works as a performance artist, conceptual artist, photographer, painter, sculptor, composer, and singer, in addition to her roles as a musician and filmmaker. That range of occupations is documented across her career, and she continues to be identified with all of them.

Among the honors she has received are the Great Immigrants Award and the Women's Caucus for Art Lifetime Achievement Award, both recognizing her contributions across those many fields. The Library of Congress catalogs her under the authorized label Ono, Yōko, preserving the Japanese-language form of her name. Wish Tree for Washington, DC remains one of her named notable works, alongside SKY, and together they represent the concrete output of a career that has moved fluidly between music, visual art, film, and activism.