The 20-year-old who twerked up a storm at the VMAs and got naked in her new "Wrecking Ball" video, says being cast on the Disney show when she was 13 made her grow up in a hurry.
"I was an adult when I was supposed to be a kid," she says in the October issue of Harper's Bazaar. "So now I'm an adult and I'm acting like a kid."
Cyrus, who moved out of her dad Billy Ray's home when Hannah Montana wrapped and into "a big ol' house" with a skating ramp in the backyard, wouldn't talk about her turbulent relationship with her fiancé, Hunger Games star Liam Hemsworth, but says that she still plans on getting married … one day.
"I definitely don't have time to deal with a wedding right now. But I will at some point," she says.
Terry Richardson for Harper’s BAZAAR
"I'm not saying you need to take a break because you're crazy," she says. "I'm saying you need to take a break so you can be crazy."
As for Lindsay Lohan's decision to cut toxic people out of her life, Cyrus says, "I'm like, 'Honey, you're going to have to move out of this universe because everywhere you go there are toxic people.' "