Not just a pretty face! Justin Bieber talks ambition and growing up as he pouts for the camera in new photoshoot!

He was forced to grow up quickly when he was catapulted into stardom at the tender age of 14.

And it seems that after turning 18 earlier this year, Justin Bieber is feeling more mature.

He speaks out about how becoming an adult has affected his music in a new interview.

All grown-up: Justin Bieber pouts and poses in a black and white photo shoot for Rollacoaster magazine

The megastar chatted to Rollacoaster magazine and also posed for a photo shoot for the publication.

The Boyfriend singer sports typical dressed won attire as he pouts for the camera in the black and white images.

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Some close-up shots show the cute teen sporting a T-shirt emblazoned with the word ‘Mother’ as he smoulders for the photographer.

Adulthood: Justin seems to have matured since turning 18 earlier this year

Working the camera: One of the artistic shots show the star looking handsome as he poses in a denim ensemble

Determined: Justin isn't about to get complacent any time soon and says he wants his next music video to get a billion views

In others, he sports tracksuits and points provocatively at the camera and a final sees him dressed in jeans and a white T-shirt under a denim shirt.

Justin spoke to the magazine about the ways in which he is maturing in conjunction with his famous fans, the Beliebers, and his music.

He told Rollacoaster: ‘I am growing up, I am now 18 and my fans are growing up with me.

‘I’m getting older and I want that to reflect in my album – it is just more mature and reflecting the age that I am.’

And Justin insists that he isn’t about to get complacent any time soon, instead always striving to do better.

He said: ‘Each time I break a record I’m always happy. With my YouTube stuff, Baby has more views than any video – ever. So my next goal is to reach one billion views on a video.’

Justin’s interview and photo shoot feature in the Sumer 2012 issue of Rollacoaster magazine, out now.

Cover star: The Summer 2012 issue of Rollacoaster is out now

Branching out: Justin says his new-found maturity is reflected in his album as he grows up alongside his fans