While working on the Godfrey show, the McGuires befriended singer Lu Ann Simms and attended her wedding to music publisher Loring Buzzell in July 1956.

The Andrews Sisters performed similarly in films in the 1940s, and were the first female vocal group to move when they sang, rather than just standing at a microphone.

[9] They performed for five Presidents of the United States: Richard Nixon, Gerald Ford, Jimmy Carter, Ronald Reagan, and George H. W. Bush, and for Queen Elizabeth II.

During the 1960s, the sisters maintained a busy television schedule, making frequent appearances on popular variety programs hosted by Ed Sullivan, Dean Martin, Danny Kaye, Milton Berle, Andy Williams, Perry Como, and Red Skelton.

Giancana was shot in 1975 by an unknown gunman thought to be Dominic "Butch" Blasi, his closest confidante and right hand man of sorts.

Phyllis resided for decades in a famously showcased mansion in Las Vegas, boasting its own beauty parlor, a swan moat, and a replica of the Eiffel Tower which actually rose through the home's roof.

When asked by Barbara Walters during a 1980s ABC-TV 20/20 interview from within the mansion if any of the money to build the lavish home came from Giancana, Phyllis denied the suggestion, claiming that she invested heavily in oil when the sisters were at the height of their popularity.

Singing their greatest hits as part of their act, they were also featured performing specialty numbers such as the frantic "I Love a Violin", the a cappella "Danny Boy", and a segment during which Phyllis retired backstage as Christine and Dorothy shared the spotlight playing a concert arrangement of "The Way We Were" on twin pianos.

Other highlights in the act were a comical Trinidad-flavored tune, a soft rendering of "Memory" from Broadway's Cats, and a "Money Medley", which they also performed live on the Jerry Lewis MDA Telethon in 1994.

Since then, the sisters had made occasional public appearances together, including in 2004, when they reunited to perform in a PBS special Magic Moments: Best of '50s Pop.

[citation needed] On September 7, 2012, Dorothy McGuire died at her son's home in Paradise Valley, Arizona, after suffering from Parkinson's disease and age-related dementia; she was 84.

[20] Phyllis McGuire, the last surviving member of the trio, died peacefully at her estate in Las Vegas, Nevada, on December 29, 2020, of natural causes; she was 89.

The Robert Altman film Come Back to the Five and Dime Jimmy Dean (1982) prominently features the music of The McGuire Sisters.

Their number one single, "Sincerely", is lip-synced by the film's stars Cher, Karen Black and Sandy Dennis as "The Disciples of James Dean."