Lindsay Lohan tells Oprah she wants to leave her past behind

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Actress Lindsay Lohan is showered with gold glitter, second left, as she arrives with her attorney Mark Heller, after attending a trial Monday, March 18, 2013, at Los Angeles Superior court. (AP Photo/Damian Dovarganes)

"I feel whole again," said Lindsay Lohan to Oprah Winfrey in an interview that aired on OWN Sunday evening. "And I have such a desire to want to keep this feeling and stay this way and I'm willing to do whatever it takes."

Four days after the troubled star walked out of rehab for the sixth time, Lohan - sober and svelte in a snug orange dress - sat with Winfrey for a candid sit-down discussion on her family issues, contentious court battles and  struggles with addiction.

"Are you an addict?" Oprah asks the 27-year-old actress.

"Yeah," Lohan responds.

"What is your drug of choice?" Winfrey proceeds.

"Alcohol," says Lohan, which "in the past was a gateway to other things for me," she continues. "I tried cocaine with alcohol."

"Did you enjoy doing it?" Oprah asks Lindsay regarding her use of cocaine.

"No!" exclaims Lohan, who admits she's paired the drug with alcohol about 10-15 times. "It never felt good the next day." Cocaine, she explains, "allowed me to drink more. I think that's why I did it when I did it. It was a party thing. People would have it, and I would do it," she continues.

Oprah then asks Lindsay what she's on these days.

"Vitamins," responds the star.

"You're not on any prescription drugs?" asks Winfrey.

"No, no," says a defensive Lohan, who then adds, "I take Nexium because I have acid reflux."

The hour-long interview included an advertisement from Lohan's rehab facility, Cliffside Malibu. The treatment program as touted in the advertisement, guarantees success. Lohan will continue therapy into late 2014.

Oprah's interview aired as one part of Lohan's eight-part docuseries that is set to air on OWN next year.