Worst Performances: The Last Dragon (1985), Action Jackson (1988)

In Vanity's defense, she wasn't really an actress. After hitting it big on the pop charts, as part of the all-girl trio Vanity 6, in 1982 with the single "Nasty Girl," the singer (born Denise Matthews) enjoyed a fruitful recording career that parlayed into her own solo LP in 1984, titled Wild Animal. Feeling a bit overzealous career-wise, Vanity gave acting a try in the 1985 soon-to-be-cult-classic The Last Dragon; it's just too bad that her most convincing scene involved her serenading kung fu Leroy Green (Taimak), instead of, you know, selling a dramatic moment of any kind.