Connie Francis, the wholesome pop star of the 1950s and 1960s who would later serve as an ironic title for a personal life filled with heartbreak and tragedy, has died at age 87.

Francis had recently been treated for pelvic pain caused by a fracture and was diagnosed with pneumonia while in hospital, the president of her record label, Ron Roberts, told BBC News.

Francis was a top performer of the pre-Beatles era, rarely off the charts from 1957 to 1964.

Recently, her 1962 song Pretty Little Baby became a viral hit on TikTok.

Able to appeal to both young people and adults, Francis had more than a dozen top 20 hits, starting with Who’s Sorry Now? and including the No. 1 songs Don’t Break the Heart That Loves You and The Heart Has a Mind of Its Own.

Like other teen favourites of her time, she also starred in several films, including Where the Boys Are and Follow the Boys.

Francis in Florida in 2013. Photo: AAP

The dark-haired singer was just 17 when she signed a contract with MGM Records following appearances on TV variety shows.

Her earliest recordings attracted little attention, but then she released her version of Who’s Sorry Now?, an old ballad by Ted Snyder, Bert Kalmar and Harry Ruby.

It, too, had little success initially until Dick Clark played it on his American Bandstand show in 1958.

Francis said that without Clark’s support she would have abandoned music. Photo: AAP

Francis followed with such teen hits as Stupid Cupid, Everybody’s Somebody’s Fool, and Lipstick on Your Collar.

Her records became hits worldwide as she re-recorded versions of her original songs in Italian and Spanish, among other languages.

Meanwhile, a romance bloomed with fellow teen idol Bobby Darin, who had volunteered to write songs for her.

But when Francis’s father heard rumours that the pair were planning a wedding, he stormed into a rehearsal and pulled a gun on Darin, ending their relationship and seeming to set on her on a pained and traumatic path.

She chronicled some of it in her autobiography, Who’s Sorry Now?.

“My personal life is a regret from A to Z,” she told The Associated Press in 1984, the year the book came out.

“I realised I had allowed my father to exert too much influence over me.”

Her father, George Franconero, was a roofing contractor from New Jersey who played the accordion. He had his daughter learn the instrument as soon as she began to show an aptitude for music.

When she was four, he began booking singing dates for her, going on to become her manager.

Although Francis’s acting career had faded by the mid-1960s, she was still popular on the concert circuit when she appeared at the Westbury Music Centre in New York, in 1974.

She had returned to her hotel room and was asleep when a man broke in and raped her at knifepoint. He was never captured.

Francis sued the hotel, alleging its security was faulty. A jury awarded her $US2.5 million ($A3.8 million) in 1976.

The two sides eventually settled out of court for $US1.475 million while an appeal was pending.

Francis said the attack destroyed her marriage and put her through years of emotional turmoil.

She suffered tragedy in 1981 when her brother George was shot dead as he was leaving his New Jersey home.

Later in the decade, her father had her committed to a mental hospital, where she was diagnosed as manic-depressive.

At one point she attempted suicide by swallowing dozens of sleeping tablets. After three days in a coma, she recovered.

She was married four times and would say that only her third husband, Joseph Garzilli, was worth the trouble.

The other marriages each lasted less than a year.

Concetta Rosemarie Franconero was born on December 12, 1937, in Newark, New Jersey.

At age nine she began appearing on television programs, including Arthur Godfrey’s Talent Scouts and The Perry Como Show.

It was Godfrey who suggested she shorten her last name.

Clark featured her repeatedly on American Bandstand, and she said in later years that without his support she would have abandoned her music career.

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-with AAP