Justin Bieber on 'Today' talks 'Believe' and transitioning to adulthood, plus performs for nearly 8,000 fans

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Justin Bieber was back on "Today" Friday (June 15) as part of the Toyota Summer Concert series. His new album "Believe" drops Tuesday (June 19) and he spoke with host Matt Lauer about how this is his transition from teen idol to adult artist and how that can be a little scary.

"At the end of the day, it is [scary]. I'm 18 and I have a lot of insecurities ... me being in my position, it doesn't get rid of those insecurities," says Bieber.

"I know that I've been working hard on [the album] and I know that I've been doing really well, so I'm confident in the album," he continues. "But I think it's about just proving people wrong and making good music and performing better than everyone else in order for me to cross over, or else I'm going to be another teen heartthrob. I want to be remembered."

When asked about if he's a man yet, Bieber agrees with manager Scooter Braun that he's not.

"I'm at a place where I'm 18, I'm still growing up. I'm still learning about different things - girls, my music. I'm not all the way there," says Justin. "But I'm growing and my fans are growing with me and I want my music to reflect that."

Bieber later sat down with "Mrs. Bieber," the little girl named Avalanna Routh who is suffering from a rare form of brain cancer. Bieber had previously been to see her when he found out how much she loves him and he's been keeping in touch with her ever since. 

Below are some videos of Bieber performing - in case you aren't one of the lucky 8,000 fans who saw the concert in person (some of whom have been camped out since Tuesday morning in preparation for the concert).


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Photo/Video credit: NBC