Reformed party princess Lindsay Lohan has bid farewell to her partying ways, and credits rehab for changing her life.

Sure, she may have driven her car into a tree while high on coke, but she insists she is a changed person — and regularly meditates to avoid going back to her old ways.

The young starlet tells the upcoming issue of Britain’s Tatler: “(Rehab) changed my life. I didn’t have a good grip on it and I needed to get my sh*t together. I was going out too much. There were therapy classes to talk about relationships. If I get stressed out, I say a serenity prayer and I meditate too.”

And despite her numerous stints in rehab, Lindsay insists she will not give up her social life, claiming it does not conflict with her acting career. “Look, I want to win Oscars. I want Academy Awards. I am serious about what I do and what I want to achieve. I detest being known as a party girl. Even that term ‘partying’ is such an annoyance,” she says. “I’m a 21-year-old actress who loves to act and enjoys spending time with her friends because I am a very social person. Why am I chastised for that? I’ve been a dancer all my life and it doesn’t kill you to go out and dance.”

What’s more? While you’d think she’d like to snuggle up in bed with the latest issue of Us Weekly, Lindsay apparently prefers studying Machiavelli’s ‘The Prince.’

Machiavelli - an Italian philosopher who lived in the 16th century - is famous for writing about political intrigue, back-stabbing and manipulation.

La Lohan says that she has a copy of his book with her at all times: “I was going out with someone and they said I should read Machiavelli. Now it is always with me.”

What next? Paris Hilton reading ‘The Unbearable Lightness of Being’?

Lindsay Lohan brunches pals and her Promises babysitter at Geoffrey’s in Malibu on Tuesday