Sheila Diana Ferguson (born October 8, 1947) is an American singer, songwriter, actress, and author. She was the second longest-serving member of the 1970s 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 was international success topping the UK Singles Chart and peaked at #2 in the US.
Following her departure from The Three Degrees in 1986, Ferguson went on to have her own solo singing career, touring internationally, making multiple TV appearances, and releasing a solo album titled A New Kind of Medicine. She has forged a prolific stage and screen career in the UK, starring in numerous musicals, soul legend tours, and her own sitcom Land of Hope and Gloria. She is also the best-selling author of Soul Food: Classic Cuisine from the Deep South.