With all the world travel, sold-out concerts and magazine sales, what's the most excited thing Justin says has happened to him? "I got to perform for President Obama!"
As for the screaming fans, Justin says he's still getting used to them. "It's pretty hard to comprehend. Like everything's just kind of surreal," he says.
So why does he think teen girls are screaming and crying when they see him? "I have no clue!"