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Lauer asked the 25-year-old starlet about the major changes she's making to ensure she doesn't fall back into the cycle of addiction that has led to her last few years of trouble with drugs and the law.
"Some of the main things are just the people I surround myself with... It gets very lonely in this industry, because you're constantly with people, and then you're alone," Lohan explained. "So I just allowed a lot of people to be around me at all times, and I don't think that they were necessarily there for the right reasons, and I wasn't concerned with that."
Lohan went on to admit that she played blind to the negative impact of her enabling entourage and didn't make healthy decisions.
"I was being a bit ignorant towards the fact that maybe I should not go out all the time, maybe I should rest, maybe I should start to grow up and take care of myself."
Now, however, Lohan says she knows who she can trust, including her family -- her mother and brothers and sisters -- and a "great group of people" who work on her team.
When Lauer asked this week's Saturday Night Live host about the rumors that she's making a comeback at age 25, Lohan said the idea was "crazy" but added that she's glad the moment has finally arrived: "I'd rather it be now and not have to deal with, go through it later."
"I regret the choices that I've made, but I'm grateful for where I am today because of them," she explained. "I don't need to see any more negative stuff. I don't need to put myself in those places any more."
Lohan also admitted that she knows it will take time (and good behavior) to prove she's deserving of future roles and film projects.
"People can say things all they want, but I still need to go through the process of proving myself -- with SNL, being on time, keeping my -- I can't say the word but -- 'stuff' together," she said.
Lohan has one person in particular to thank in anticipation of her hosting gig on Saturday Night Live this coming weekend.
"I'm really lucky because Lorne Michaels has really been supportive of me. I actually went and emailed him and kind of was harrassing him to meet with me to let me do the show," she said. "He believes in me. It's just a process, and I'm willing to go through that process and prove I'm accountable."
Watch the interview below: