Written By: Eliza Berman

LIFE’s coverage of Frank Sinatra over the course of his illustrious career was, to put it mildly, ample. But of all the magazine’s photo essays and reviews and bits of gossip, perhaps nothing captured his hold over the American public young women, in particular better than letters sent to the editors in response to an article that deigned to compare Sinatra to one of his contemporaries, the actor Van Johnson:

Sirs:
Don’t you think it quite ridiculous to compare a redheaded, freckle-faced, flabby monstrosity like Van Johnson to a fascinating, slim, brown-haired, blue-eyed, gorgeous hunk of heaven like our Frank Sinatra?
NORMA BERKOWITZ
MAUREEN HIGHES
Medford, Mass.

When Norma and Maureen wrote this letter to LIFE in 1944—sandwiched, as it was, between others that expressed the same sentiment—Sinatra was just shy of 30 and two years into the budding phenomenon of “Sinatramania.” Not only was he monstrously popular, but he was proving there to be a profitable market for popular music targeted to a budding new group called teen-agers. The singer, born on Dec. 12, 1915, in Hoboken, N.J., had already developed as recordings continue to prove nearly two decades after his death at 82 one of the most recognizable voices in history. It was, after all, why they called him “The Voice.”

It was also why, between the early 1940s and the early 1970s when LIFE ceased to be a weekly publication, the magazine dispatched a cadre of photographers—Peter Stackpole, Gjon Mili, Allan Grant, Bill Eppridge, John Dominis and Michael Rougier to name a few—to bring a piece of Ol” Blue Eyes into its readers’ homes week after week. Here, in celebration of Sinatra’s centennial, are their most memorable portraits of the unforgettable singer.

Liz Ronk edited this gallery for LIFE.com. Follow her on Twitter @lizabethronk.

25 year old Frank Sinatra poised at mike, singing As Time Goes By at Riobamba nightclub, 1943.

Twenty-five-year-old Frank Sinatra sang “As Time Goes By” at the Riobamba nightclub, 1943.

Herbert Gehr The LIFE Images Collection/Getty Images

Frank Sinatra with wife Nancy and 3 yr-old daughter Nancy Jr.at home, 1943.

Frank Sinatra with wife Nancy and 3 yr-old daughter Nancy Jr. at home, 1943.

Herbert Gehr The LIFE Images Collection/Getty Images

Frank Sinatra singing Close to You in CBS radio broadcasting studio as his admirer Rita Stearns, the winner of the Why I Like Frank Sinatra contest, looks on, in the audience, 1944.

Frank Sinatra sang “Close to You” in the CBS radio broadcasting studio as his admirer Rita Stearns, the winner of the “Why I Like Frank Sinatra” contest, looked on, 1944.

Herbert Gehr The LIFE Images Collection/Getty Images

Frank Sinatra singing "Five Minutes More," 1946.

Frank Sinatra sang “Five Minutes More,” 1946.

Peter Stackpole The LIFE Picture Collection/Getty Images

Ethel Merman and Frank Sinatra singing duet Your the Top in preliminary rehearsal for Anything Goes presented on TV show The Colgate Comedy Hour, 1954.

Ethel Merman and Frank Sinatra sang the duet “You’re the Top” in a preliminary rehearsal for “Anything Goes,” presented on “The Colgate Comedy Hour,” 1954.

John Swope The LIFE Images Collection/Getty Images

Frank Sinatra and Donna Reed (R) holding Oscars while posing w. presenter, actress Mercedes McCambridge, for Best Supporting Actors in the movie "From Here to Eternity" at the 26th Annual Academy Awards Ceremony, 1954.

Frank Sinatra and Donna Reed (right) held the Oscars they received for Best Supporting Actors in the movie “From Here to Eternity” while posing presenter and actress Mercedes McCambridge, 1954.

George Silk The LIFE Picture Collection/Getty Images

Dean Martin and Frank Sinatra, 1958.

Dean Martin and Frank Sinatra, 1958.

Allan Grant The LIFE Picture Collection/Getty Images

Director Frank Sinatra during filming of movie None But The Brave, 1964.

Director Frank Sinatra during filming of movie “None But The Brave,” 1964.

Don Cravens The LIFE Images Collection/Getty Images

Nancy Sinatra with father, Frank Sinatra, during producing and directing of movie "None But The Brave," 1964.

Nancy Sinatra with father, Frank Sinatra, during producing and directing of movie “None But The Brave,” 1964.

Don Cravens The LIFE Images Collection/Getty Images

Frank Sinatra with girlfriend Mia Farrow on deck of yacht Southern Breeze, 1965.

Frank Sinatra with girlfriend Mia Farrow on the deck of the yacht Southern Breeze, 1965.

Bill Eppridge The LIFE Picture Collection/Getty Images

Frank Sinatra 1965.

Frank Sinatra, 1965.

John Dominis The LIFE Picture Collection/Getty Images

Frank Sinatra giving musicians of the Count Basie Band direction at a rehearsal in an LA sound stage. Count Basie is playing on the piano, 1965.

Frank Sinatra gave the musicians of the Count Basie Band direction at a rehearsal in an LA sound stage. Count Basie was playing on the piano, 1965.

John Dominis The LIFE Picture Collection/Getty Images

Frank Sinatra relaxing with pet dog Ringo at home, 1965.

Frank Sinatra relaxed with his dog Ringo at home, 1965.

John Dominis The LIFE Picture Collection/Getty Images

Sammy Davis Jr. talking with singer Frank Sinatra at his farewell peformance, at UCLA, 1971.

Sammy Davis Jr. talked with singer Frank Sinatra at a performance, at UCLA, 1971.

Michael Rougier The LIFE Picture Collection/Getty Images

Frank Sinatra waves at the camera during a rehearsal for a MPTRF benefit, 1971.

Frank Sinatra waved at the camera during a rehearsal for a benefit concert, 1971.

Michael Rougier The LIFE Picture Collection/Getty Images

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