Jennifer Yvette Holliday is an American singer and actress. She started her career on Broadway in musicals such as Dreamgirls (1981–83), Your Arms Too Short to Box with God (1980–81) and later became a successful recording artist. She is best known for her debut single, the Dreamgirls number and rhythm-and-blues/pop hit, "And I Am Telling You I'm Not Going", for which she won a Grammy in 1983. She also won a 1982 Tony Award for Dreamgirls.

Source.