Sheila Diana Ferguson (born October 8, 1947) is an American singer, songwriter, actress, and author, who has worked primarily in the United Kingdom. Between 1966 and 1986, she was a member of the American female soul music group The Three Degrees, singing lead vocals on most of the group's biggest hits, most notably "When Will I See You Again", which had international success, topping the UK Singles Chart and peaking at #2 in the US. Wikipedia