From Wikipedia, the free encyclopedia Denise Katrina Matthews (January 4, 1959 – February 15, 2016), formerly known as Vanity and sometimes credited as Denise Matthews-Smith or D.D. Winters , was a Canadian singer, songwriter, dancer, actress and model, who turned away from her acting and music career to concentrate on evangelism . Vanity's career lasted from the 1980s until the early mid-1990s. She was the lead singer of the female trio Vanity 6 from 1981 until it disbanded in 1983. The group was well known for their 1982 R&B / funk hit " Nasty Girl ". Vanity's music career also included two solo albums on Motown Records , Wild Animal and Skin on Skin , as well as the hit singles " Pretty Mess ", " Mechanical Emotion ", and " Under the Influence ". She also had a successful acting career, starring in films The Last Dragon , 52 Pick-Up , and Action Jackson .