T'Keyah Crystal Keymáh (born Crystal Walker;[2] October 13, 1962) is an American actress and singer. In addition to her status as an original cast member of the Fox sketch comedy series In Living Color (1990–1994), Keymáh is also known for her roles as Erica Lucas on the CBS sitcom Cosby (1996–2000), Tanya Baxter on the Disney Channel sitcom That's So Raven (2003–2005), and as the star and host on the Keymáh Network sketch variety show The Cool Crystal Show (2020–present).[3]