Demi Lovato, spilled details about her sobriety and friendships in Hollywood during a cover story interview in Cosmopolitan's September issue.

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The former "The X Factor" judge donned a white mesh cut-out top along with a skin tight white skirt that showed off her curves in an Instagram posted by the magazine.

It captioned the pic "BABE ALERT: @ddlovato on the cover of the September issue."

During the interview, Lovato, who has always been candid about her drug and alcohol issues and 2010 rehab stint, admitted she once envied former Disney Channel pal Miley Cyrus for her carefree attitude and ability party how she wanted.

"There was a time when I was jealous of people who were able to party," she said.

"For instance, Miley -- in her music video 'Can't Stop,' her whole thing was partying and not giving a [explicit]. Part of me was super jealous that I couldn't be like that. I had to look at my life and be like, 'Okay, that's just not what you can do. There's no need to be bitter about it.'"

According to "Entertainment Tonight," the 22-year old "Cool For the Summer" singer credits 35-year old boyfriend, Wilmer Valdderama, for her continued sobriety.

The two started dating in 2010 when Lovato turned 18, just before she started rehab.

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She is also grateful Valdderama didn't abandon her, even when he was told he should.

"People told him, 'You should probably leave," Lovato shared.

"'She's on a spiral, and you're going to be sucked down with it.' But he was like, 'I'm not leaving. This is somebody I really care about.' We relate on a lot of levels."

The starlet also discussed her new music, which she says is inspired by the likes of Rihanna and Nikki Minaj.

"I feel like I'm the only person other than Rihanna and Nicki Minaj who isn't afraid to say, 'Try something on me and I'll [explicit] beat your [explicit],'" Lovato said.

In her new music video for "Cool For the Summer," the singer shows just how bad she can be.