(NEW YORK) -- Just one week ago, U.S. Marshals took away country singer Mindy McCready's 5-year-old son after she fled with him from Florida to Arkansas. But now, McCready says things are finally going her way: She is pregnant with twins, in a committed relationship with the twins' father and believes she will get her son back.
"Everybody makes mistakes. I understand why I've made the bad choices I've made, and how not to make them in the future," she told ABC News' Andrea Canning in an exclusive interview.
In 1996, McCready was a rising star in the country music world, singing the number one hit, "Guys Do It All the Time," and selling millions of records. But the years that followed saw the singer trapped in a downward spiral of substance abuse, arrests and reported domestic violence at the hands of her then-boyfriend and Zander's father, Billy McKnight.
McCready left McKnight, but not before the relationship, she said, took over, "every part of my brain and my heart."
"I was an idiot," she said. "I was completely and totally love-struck and insane over that person and over what he was doing to me. A person that hits you like that controls you, and he controlled every part of me. I stopped singing. I stopped socializing with my friends, with my brothers. I stopped living."
McKnight later pleaded guilty to domestic assault and served 30 days in prison.
McCready's mother, Gayle Inge, was given temporary custody of Zander in 2007 while McCready served six months in prison for a probation violation related to an earlier drug charge. After leaving jail, she appeared on the reality show, Celebrity Rehab, which she said saved her life.
Her reason to live, she said, is Zander: "I couldn't imagine loving something so much that instead of wanting to just lay down and die, I wanted to stand up and fight."
That fight included trying to win back custody of Zander from Inge, whom McCready has accused of abuse.
Zander is now staying with a foster family in Arkansas, but there is a silver lining for McCready. She said she was pleased with an Arkansas circuit court judge's custody ruling this week. Details of the ruling have been sealed.
McCready believes she'll have Zander back in time for Christmas. In the meantime, she's writing new music inspired by her experiences.
Watch Canning's full interview with McCready Friday night at 10 p.m. ET on 20/20.
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