(1985–1988), Althea Tibbs in In the Heat of the Night (1988–1993), or her recurring role as fashion designer Donna Cabonna on That's So Raven (2006) during its final season.

Johnson is known as a cast member of the FOX sketch comedy television series In Living Color (1993–1994) during its final season, and has had recurring or regular roles in Melrose Place, JAG, Girlfriends and The InBetween.

She also appeared in a number of films, including Hollywood Shuffle (1987), I’m Gonna Git You Sucka (1988), Robot Jox (1989), which featured her only career nude scene, The Five Heartbeats (1991), True Identity (1991), and Strictly Business (1991).

[6] On television, she played a leading role in the 1989 film Dream Date and starred as Carrie Jones/Carolyn Dimes in the 1990 miniseries Lucky Chances.

She also has made guest appearances on other TV series, including That's So Raven; Living Single; Murder, She Wrote; Leverage; Ally McBeal; Girlfriends; The Parkers; Dharma & Greg; CSI: Crime Scene Investigation; NCIS; Tyler Perry's House of Payne and Grey's Anatomy.