If you mean Crossroads the TV series and not the dire Britney flick then her name is Joanne Farrell. She hasn't actually appeared in a hell of alot. Here's the only two that I could find.
"Esther" (1996) playing "Herself" in episode: "Why do we Love a TV Baddy?" 12/7/2001
and..........
"London's Burning" (1988) playing "Donna"(episode # 13.4) 2/11/2001