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Demi Lovato knows exactly what she wants in a man.

"I don't have many deal breakers. I've done so much in my life, it doesn't feel right to judge other people," the 19-year-old tells the July issue of Cosmopolitan. "Oh, I know one quality I won't tolerate: I would never be with a guy who is controlling."

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Though she's currently single, Lovato, whose exes include Wilmer Valderrama and Joe Jonas, envisions herself walking down the aisle and starting a family by the time she turns 29. "I want to be married with kids in 10 years," she tells the magazine.

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The teen superstar, who will join Britney Spears, 30, on "The X Factor" this fall, also opens up to Cosmopolitan about being diagnosed with bipolar disorder while seeking treatment at Timberline Knolls in late 2010.

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"I felt relieved when I found out. Like I'm not completely crazy; there's a medical reason for all of it," she explains. "It's a daily thing; you don't get time off from it. And if I feel myself slipping back into old patterns, I have to ask others for help, which is hard for me to learn, because I really like doing everything on my own."

In addition to filming "The X Factor," Lovato will kick off her summer tour June 12 in Del Mar, Calif.

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