UNDATED (CNN) -- Lindsay Lohan has finished her sixth stint in rehab. So what's next for her? The troubled actress sat down for a revealing, one-on-one interview with Oprah Winfrey.

This is the troubled actress' first interview since completing three months of court-ordered treatment for substance abuse, and the 27-year old's sixth trip to rehab.

Lohan told Winfrey that her troubled past is behind her and she's hoping to restore her reputation and restart her acting career. Oprah asked, "What's going to be different this time?" Lohan responds, "I'm not taking Adderall. That's a big deal."

She acknowledged she has a battle with addiction. Oprah asked, "You were addicted to Adderall?" Lohan responds, "Yes, because that's all I knew. I was convinced that it ground me."

Lohan confessed to using cocaine at least 10 to 15 times. Lohan says, "I snorted it. I never injected anything except b12 shots."

And she revealed her two week jail sentence in 2010 for probation violation, was necessary for her road to recovery.

With rehab behind her, Lohan admits that launching a career comeback won't be easy. First step she says is, "Prove myself in the way that I did in the past and that I lost. You know I have to re-gain the trust of people in my career that have their doubts."

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