JANET JACKSON DISCUSSES MJ'S DRUG PROBLEM: Michael's sister says she and the family did several interventions, but they never worked.

       "You can't make 'em drink the water," Jackson told ABC's Robin Roberts in an interview that aired last night.      

       When asked if her brother was in denial about his addiction, she replied, "Possibly."     

       "I wish he could answer this question for you and not me," she told Roberts for her "In the Spotlight" special. "I felt that he was in denial."       

       As previously reported, Jackson blames Dr. Conrad Murray, Michael Jackson's personal physician, for his death June 25. Prosecutors in Los Angeles are weighing charges against Murray, who told police he administered a powerful anesthetic to the singer shortly before he died.      

       She said she hasn't seen "This Is It," the new documentary film spotlighting her late brother as he prepared for the concert tour that would've taken place last summer.

       "I definitely won't, not right now," she said. "I don't know if I will ever see it."