Justin Bieber wants to prove he is more than just a "teen heartthrob".

The 18-year-old singer — who is well known for his teenage girl fanbase — gets "annoyed" people place him in the category and believes he should now be considered an adult thanks to his new album.

He said: "I feel like I just don't want to be another teen heartthrob. I just think that just annoys me. To think that's what people will — will think of me — or, like, I just want to prove people wrong.

"My new album Believe has really showcased what I'm capable of — especially becoming an 18-year-old, and becoming an adult. And hearing older people say, 'Wow, this new album's great. Like I didn't know that was Justin Bieber."

Despite a legion of adoring fans and millions in the bank, Bieber still dreams of one thing — a Grammy award.

Speaking in an interview with Ryan Seacrest on Today which will be aired in full on Thursday (13 September), he said: "That's something that I've always – when I was little, like, 'Oh my God, like what if I won a Grammy?' That would be crazy. So that's one of the things that I'm still striving for."