The Three Degrees are an African-American female vocal group formed circa 1963 in Philadelphia, Pennsylvania. Although 16 women have been members over the years, the group has always been a trio. The group were particularly successful in the UK, achieving 13 Top 50 hit singles between 1974 and 1985. The original members were Fayette Pinkney, Shirley Porter and Linda Turner. Porter and Turner were eventually replaced by Helen Scott and Janet Harmon and the group was signed to Swan Records in Philadelphia. The line-up from 1967 to 1976 was Pinkney, Valerie Holiday and Sheila Ferguson, who would go on to sing lead on most of the group's biggest hits. This line-up topped the US Hot 100 as featured vocalists on the MFSB single "TSOP (The Sound of Philadelphia)" in 1974, and had seven UK Top 40 hits, including the 1974 single "When Will I See You Again", which was a huge international hit, reaching the Top 5 in seven countries, including number two in the US and topping the UK Singles Chart.