Jo Elizabeth Stafford (November 12, 1917 – July 16, 2008) was an American traditional pop singer renowned for her pure voice and versatility. Born in Coalinga, California, she initially trained to be an opera singer but transitioned to popular music due to economic hardships during the Great Depression. Stafford began her career with her sisters in a group called The Stafford Sisters, which performed on radio and in films. She later joined The Pied Pipers, a vocal group that gained prominence performing with Tommy Dorsey's orchestra, alongside Frank Sinatra.

In 1944, Stafford embarked on a solo career, earning the nickname "G.I. Jo" for her performances for American soldiers during World War II. She became a top-selling artist for Capitol Records in the 1940s and later moved to Columbia Records. Her 1952 hit "You Belong to Me" made her the first female artist to top the UK Singles Chart and contributed to her status as the first woman to sell 25 million records.

Stafford married twice, first to John Huddleston and later to Paul Weston, with whom she had two children. The couple developed a comedy routine as Jonathan and Darlene Edwards, earning a Grammy Award for Best Comedy Album in 1961. Stafford largely retired from performing in the mid-1960s but remained influential in the music industry. Her legacy includes 31 top-ten hits and a reputation as "America's Most Versatile Singer."