Miley Cyrus on Outgrowing 'Hannah Montana'

As Disney's hit series "Hannah Montana" approaches its final hurrah, Miley Cyrus gets candid with ET about the challenges of growing up while doing a show with a "a lot of restrictions."

"I'll be 18 this year," Miley says. "Definitely you do a lot of growing, and that's hard to do on a show that does have a lot of restrictions as well. Because there are things we want to do that [involve growing up], but then what?

"Once you put them in college, it's like, 'Okay. Then Hannah Montana does what?' So, it's kind of hard to keep it going when there's only really so much you can do with the character that can only grow so much," she continues.