Ono’s music, per Money Inc., saw her perform alongside Lennon on Beatles songs and in their later venture The Plastic Ono Band. She also released modestly successful albums as a solo artist, such as “Fly” (1971). Couple this with her management of Lennon’s estate (estimated to worth $200 million when he died, per The Daily Mail) and royalties from The Beatles’ works, and it stands to reason that Ono herself would be worth a fortune (even if son Sean Lennon has taken the reins with some business ventures of his father’s).

Ono’s art career was pivotal too. Since the 1960s, she has been showcasing exhibitions of her work in Tokyo, New York, and beyond. From the performance work “Cut Piece” in Kyoto’s Yamaichi Concert Hall (1961) to 2015’s “Skylanding” (a stunning piece that will remain on display at Jackson Park, Chicago), she has released numerous successful works. Her 2019 piece, “Refugee Boat,” at Manhattan’s River To River Festival, proved that the spirit of solidarity and philanthropy is still alive in Ono’s work.

Other estimates of Ono’s net worth suggest it may be closer to $600 million or $650 million, and while it may not top Paul McCartney’s incredible worth of $1.2 billion (per Celebrity Net Worth), but it’s a testament to her success.