Frank Sinatra was an American singer and actor who became one of the defining figures of twentieth-century popular song and vocal jazz. Rising to prominence in the 1940s, he was known for his fluid phrasing, strong rhythmic control and elegant interpretations of standards, swing and orchestral ballads. With albums such as In the Wee Small Hours, Songs for Swingin’ Lovers! and Come Fly with Me, Frank Sinatra left a lasting mark on the crooner tradition and American popular music.