Christina Ricci's guest role on Fox's Ally McBeal hasn't even started, but it's already apparent that Ally &#252ber-waif Calista Flockhart is a bad influence on the former child actress. Ricci, now 22, tells Jane magazine's May issue that she learned how to be anorexic by watching TV movies in her teens. She points to an HBO flick that featured a young Flockhart as a bulimic and anorexic. "She'd vomit into Tupperware containers and keep them in her closet. It was so crazy to me that for some reason it was appealing." Now 5'1" and 98 lbs, Ricci — who's starring in the upcoming movie adaptation of Elizabeth Wurtzel's book Prozac Nation — makes her first Ally appearance on April 15.