American singer Connie Francis, whose hits such as “Everybody’s Somebody’s Fool” and “Stupid Cupid” topped the charts in the late 1950s and 1960s, has died at age 87, her publicist announced Thursday.

Born Concetta Rosa Maria Franconero, Francis rose to fame in 1958 with the release of “Who’s Sorry Now?” and went on to become one of the most popular vocalists of her era. She sold millions of records worldwide throughout the next decade, recording albums in multiple languages.

Francis had found renewed popularity in recent months as her 1962 song “Pretty Little Baby” went viral on TikTok and other video-sharing platforms.

She was hospitalized earlier in the month after experiencing severe pain and had undergone a hip treatment, according to a post on her official Facebook page.

“It is with a heavy heart and extreme sadness that I inform you of the passing of my dear friend Connie Francis last night,” her publicist Ron Roberts posted early Thursday on Facebook, without specifying a cause.

Though Francis’s heyday faded after the 1960s, she continued to record and perform for decades.

When announcing her hospitalization on July 2, she expressed regret about having to miss a planned Independence Day show.

“Petite and pretty, Ms. Francis had an easy, fluid vocal style, a powerful set of lungs and a natural way with a wide variety of material,” wrote The New York Times after her death.

The singer had publicly discussed significant struggles with her mental health, particularly following a 1974 rape in a New York motel and the murder of her brother in 1981.

She was married and divorced four times, and in 2022 announced the death of her partner of almost two decades, Tony Ferretti.

Born in Newark, New Jersey, to an Italian-American family, Francis helped shape the American pop sound and left a lasting mark on generations of listeners.