Britney Spears opens up about partying with Paris Hilton and Lindsay Lohan and 'drug of choice' in mid-2000s

Britney Spears is getting real about what it was actually like partying with Paris Hilton and Lindsay Lohan back in the day.

In her forthcoming memoir, The Woman in Me, the "Lucky" singer reflects on her heavily photographed, highly publicized nights out with the Simple Life star and Mean Girls actress during her divorce from husband Kevin Federline in 2006.

"It was never as wild as the press made it out to be," Spears writes, per an advance copy of the book obtained by the The New York Times. The Grammy winner also notes that she wasn't interested in drugs and "never had a drinking problem" either.

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Instead, Spears explains that her "drug of choice" at the time was the ADHD medication Adderall, which she writes "made me high, yes, but what I found far more appealing was that it gave me a few hours of feeling less depressed."

Spears also reveals that several of her most infamous public incidents, including when she shaved her head and hit a photographer's car with an umbrella, occurred at a time in her life in which she was "out of my mind with grief" due to the death of her aunt and her custody battle with Federline over their two sons.

"With my head shaved, everyone was scared of me, even my mom," she writes. "Flailing those weeks without my children, I lost it, over and over again. I didn't even really know how to take care of myself."

Now, Spears acknowledges that her actions at the time weren't always appropriate. She writes, "I am willing to admit that in the throes of severe postpartum depression, abandonment by my husband, the torture of being separated from my two babies, the death of my adored aunt Sandra, and the constant drumbeat of pressure from paparazzi, I'd begin to think in some ways like a child."

The Woman in Me is out Oct. 24.

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