View 4 more images (Newser) ? With jury selection beginning at the federal case against a cult-like upstate New York group, TV actress Allison Mack pleaded guilty Monday to charges she manipulated women into becoming sex slaves for the group's spiritual leader, the AP reports. Mack, 36, who is best known for her role as a young Superman's close friend on the series Smallville, wept as she admitted her crimes and apologized to the women who prosecutors say were exploited by Keith Raniere and the purported self-help group called NXIVM.