John Deacon is a retired English musician, best known as the bass guitarist for the rock band Queen. Of the four members of the band, he was the last to join and also the youngest, being only 19 years old when he joined. Deacon wrote a number of Queen's hit singles, including "You're My Best Friend", "Spread Your Wings", "Back Chat", "I Want to Break Free" and the band's biggest selling single in the United States, "Another One Bites the Dust", as well as a number of album tracks.