The 25-year-old, who was jailed for drink-driving and also arrested for drug possession and theft, also admitted her 'stubbornness' was an issue - and if she could she would have done things differently.
The Mean Girls star told Playboy magazine: 'Looking back, I probably would have listened to and taken more advice from the people whom I admire and would have followed through with it more.
'My stubbornness at 18 and 19-years-old got in the way. During the past five years, I've learned that time flies faster than you think, and because you only live once you have to learn from your mistakes, live your dreams and be accountable.'