Olivia Newton-John's daughter talks about her battle with drugs Chloe Lattanzi, 27, said the "immense pressure" that came from being the daughter of the Grease star led her to develop an expensive addiction to cocaine, where she would often spend $60 a day on the drug. I started to get into the party scene, drinking every night, and then before long I got introduced to cocaine and all of a sudden, the combination of those things took away all the fear and depression and that is when the cycle began. Ms Lattanzi said at her lowest point she drank vodka on a daily basis, to the point where she would often have blackouts, and when her parents visiter her to intervene she would sneak out of her window at night. She had to postpone her planned marriage to jiu-jitsu instructor James Driskill after a 30-day treatment program in 2011 failed to help her get clean. Ms Lattanzi said: "I was using most day and nights. And not only was I doing coke, I was drinking vodka heavily also. I had to combine the two. I was so out of it during this time I don't even remember waking up most mornings. I'm honestly surprised I did not have a heart attack. Olivia Newton-John eventually forced her daughter to get help with Celebrity Rehab's Dr Drew Pinsky. Ms Lattanzi said: "I honestly felt that for the first time in my life there was hope. I am really proud of how far I've come and so are all my family and James. Last year, Ms Lattanzi stayed in a Californian rehab clinic for seven months, with give hours of therapy per day. She is now clean and preparing to marry her fiancé, as well as staring in a film next year.