Yogi Bear director Eric Brevig explains how Justin prepared to voice Boo Boo in the upcoming movie:

“Justin, it’s little known, used to imitate cartoon characters when he was younger,” says  Brevig. “He said when he was learning to sing, doing vocal exercises or singing lessons, part of what he did was imitate these characters. So he came in with a prepared Boo Boo voice that he’d been doing all his life, too.”

Yogi Bear 3D opens in USA cinemas on December 17.

source: USA Today