Famed artist and activist Yoko Ono, the widow of slain Beatle John Lennon, was hospitalized in New York City Friday night with what a representative said was "serious flu."
Ono, 83, was taken from the apartment bordering Central Park she once shared with her late husband to Mount Sinai West Hospital shortly after 9 p.m.
"She had symptoms along the lines of a serious flu, and her doctor thought it was best that she would get a check-up at the hospital," her spokesman, Elliot Mintz, said in a statement to ABC News.
Mintz denied reports citing anonymous sources that Ono may have had a stroke. "There is no stroke and there are no life threatening circumstances as has been described to me," he said in the statement. "It's just an advanced case of the flu."
HuffPost's calls to the hospital and to Ono's representatives weren't immediately returned.
Ono's son, Sean Ono Lennon, assured fans on Twitter that his mother was fine.
Ono was released from the hospital on Saturday, her son announced.
Ono and Lennon moved into the famed Dakota, on 72nd Street and Central Park West, in 1973. Lennon was fatally shot outside the building on Dec. 8, 1980. He was pronounced dead at St. Luke’s Roosevelt Hospital, which has since been renamed to Mount Sinai West, where Ono was being treated.
Ono, who was born in Tokyo, has worn many hats over her life, including artist, musician, filmmaker and peace activist. She has won two Grammys for her musical work, and numerous awards for her artistic pursuits and activism.