<P> After graduating from Illinois Wesleyan University School of Theatre Arts, Moore moved to Los Angeles to pursue her acting career . Moore's television credits included the UPN comedy, The Bad Girl's Guide and Hyperion Bay . She had recurring roles on Pasadena and Unhappily Ever After, with additional television credits that include guest appearances on 24, Just Shoot Me!, Friends, and Suddenly Susan . </P> <P> Moore joined the cast of MADtv in 2002, as a feature performer, for the eighth season . Moore was noted for her impressions of Christina Aguilera, Shannon Elizabeth, Sharon Stone, Trista Rehn, and Brittany Murphy . Moore is one out of three former members of the MADtv cast to join the cast of That' 70s Show . Mo Gaffney appeared in Seasons 4 and 5 of That' 70s Show as Joanne Stupak, Bob Pinciotti's girlfriend . The other MADtv alumnus is Josh Meyers, who played Randy Pearson in That' 70s Show during its final season . </P> <P> Christina Moore appeared in Married...with Children as the Gorgeous Woman in episode "Twisted" (1996). She left the MADtv at the conclusion of the eighth season to join the cast of That' 70s Show . She replaced Lisa Robin Kelly as Laurie Forman during the show's sixth season . In 2005, she starred in the TV series Hot Properties, which had aired 13 episodes . Moore also starred in Without a Paddle and Dave Barry's Complete Guide to Guys . Moore also appeared in Two and a Half Men as Cynthia Sullivan in the episode "The Soil is Moist" (2008). Moore played Alan Harper's rebound lover on Two and a Half Men . In 2008, she began a recurring role on The CW's 90210 as Tracy Clark, the sexy and mischievous mother of Naomi Clark . Moore also narrates various audio books, including Diane Duane's Young Wizards series and Yellow Star . She was part of the main cast of Hawthorne playing Candy Sullivan . </P> <P> Moore is a founding member of Bitches Funny, an all - female sketch group that has performed in New York City and Los Angeles for the past five years . She also has a recurring role in the Disney Channel show Jessie and Bunk'd, as the mother of the Ross children, Christina Ross, as well as Vanessa Baxter's empty - headed sister April on the former ABC sitcom Last Man Standing . </P>

Who plays naomi clark's mom on 90210