Harry Lillis "Bing" Crosby Jr. (/ˈkrɑːzbi/; May 3, 1903 – October 14, 1977) was an American singer and actor. Crosby's trademark warm bass-baritone voice made him the best-selling recording artist of the 20th century, having sold over one billion records, tapes, compact discs and digital downloads around the world.

The first multimedia star, from 1931 to 1954 Crosby was a leader in record sales, radio ratings, and motion picture grosses. His early career coincided with technical recording innovations such as the microphone. This allowed him to develop a laid-back, intimate singing style that influenced many of the popular male singers who followed him, including Perry Como, Frank Sinatra, Dick Haymes, and Dean Martin. Yank magazine said that he was the person who had done the most for American soldiers' morale during World War II. In 1948, American polls declared him the "most admired man alive", ahead of Jackie Robinson and Pope Pius XII. Also in 1948, Music Digest estimated that his recordings filled more than half of the 80,000 weekly hours allocated to recorded radio music.

Crosby won an Academy Award for Best Actor for his role as Father Chuck O'Malley in the 1944 motion picture Going My Way and was nominated for his reprise of the role in The Bells of St. Mary's opposite Ingrid Bergman the next year, becoming the first of six actors to be nominated twice for playing the same character. In 1963, Crosby received the first Grammy Global Achievement Award. He is one of 33 people to have three stars on the Hollywood Walk of Fame, in the categories of motion pictures, radio, and audio recording.

Crosby influenced the development of the postwar recording industry. He became the first performer to pre-record his radio shows and master his commercial recordings onto magnetic tape. Through the medium of recording, he constructed his radio programs with the same directorial tools and craftsmanship (editing, retaking, rehearsal, time shifting) used in motion picture production, a practice that became an industry standard. In addition to his work with early tape recording, he helped to finance the development of videotape, bought television stations, bred racehorses, and co-owned the Pittsburgh Pirates baseball team.