Al Jolson

In the 1930s, he was America's most famous and highest paid entertainer. Between 1911 and 1928, Jolson had nine sell-out Winter Garden shows in a row, more than 80 hit records, and 16 national and international tours. Although he's best remembered today as the star in the first (full length) talking movie, The Jazz Singer in 1927, he later starred in a series of successful musical films throughout the 1930s. After a period of inactivity, his stardom returned with the 1946 Oscar-winning biographical film, The Jolson Story. Larry Parks played Jolson with the songs dubbed in with Jolson’s real voice. A sequel, Jolson Sings Again, was released in 1949, and was nominated for three Oscars. After the attack on Pearl Harbor, Jolson became the first star to entertain troops overseas during World War II, and again in 1950 became the first star to perform for G.I.s in Korea, doing 42 shows in 16 days. He died just weeks after returning to the U.S., partly due to the physical exertion of performing. Defense Secretary George Marshall afterward awarded the Medal of Merit to Jolson's family.

He enjoyed performing in blackface makeup – a theatrical convention since the mid-19th century. With his unique and dynamic style of singing black music, like jazz and blues, he was later credited with single-handedly introducing African-American music to white audiences. As early as 1911 he became known for fighting against anti-black discrimination on Broadway. Jolson's well-known theatrics and his promotion of equality on Broadway helped pave the way for many black performers, playwrights, and songwriters, including Cab Calloway, Louis Armstrong, Duke Ellington, Fats Waller, and Ethel Waters.

Description above from the Wikipedia article Al Jolson, licensed under CC-BY-SA, full list of contributors on Wikipedia.