"Angel of Harlem" is a song by Irish rock band U2. It is the tenth track on their 1988 studio album Rattle and Hum and was released as its second single in December 1988. It peaked at number nine on the UK Singles Chart, number eight on the Dutch Top 40, number 14 on the Billboard Hot 100, and number one on the Mainstream Rock Tracks chart. Written as a homage to Billie Holiday, it was released with two different B-sides; one was an original U2 song called "A Room at the Heartbreak Hotel," while the other was a live version of Rattle and Hum's "Love Rescue Me".

Eleanora Fagan (April 7, 1915 – July 17, 1959), professionally known as Billie Holiday, was an American jazz musician and singer-songwriter with a career spanning nearly thirty years. Nicknamed "Lady Day" by her friend and music partner Lester Young, Holiday had a seminal influence on jazz music and pop singing. Her vocal style, strongly inspired by jazz instrumentalists, pioneered a new way of manipulating phrasing and tempo. She was known for her vocal delivery and improvisational skills, which made up for her limited range and lack of formal music education.

Holiday is considered a legendary performer with an ongoing influence on American music. She is the recipient of four Grammy awards, all of them posthumous awards for Best Historical Album. Holiday herself was inducted into the Grammy Hall of Fame in 1973. "Lady Sings the Blues", a film about her life, starring Diana Ross, was released in 1972.

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