"I grew up in a family where we kind of understood the business," she says. "My dad [Billy Ray Cyrus], he didn't when he first started. He had no idea where to go or what to do or how to even have people listen to your music. When I wanted to make this my life, when I wanted to be an entertainer, my family kind of knew, 'OK, this is how you get started.'"
Cyrus and Keys join The Voice's stalwart coaches, Adam Levine and Blake Shelton, in the upcoming season of competition, which debuts officially on NBC on Monday, Sept. 19.
"I think it's going to be very cool to have two female coaches," Cyrus says. "Especially because, as much as the world likes to make this girl cat-fight scenario, we're so not those girls. That's actually Blake and Adam who are more those girls."
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Cyrus previously teamed up with both Shelton and Levine last season, when she served as a key advisor for all four teams on the show.
"I wanted to be on The Voice as a coach after I mentored last time, I think, because everything I like to do in my life -- it has to be real, it has to be authentic, it has to be genuine," she explains. "Sitting and watching people sing and helping people make music, it's what I would do every day."