Denise K. Matthews (born January 4, 1959), formerly known as Vanity and sometimes credited as Denise Matthews-Smith and D.D. Winters, is a Canadian former singer, songwriter, dancer, actress, and model. Vanity's career lasted from the 1980s until the early mid-'90s.

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, to name a few.