Justin Bieber has said he included his infamous paternity dispute in his new autobiography because he wanted to get his side of the story out.

The Canadian superstar was left reeling in 2011 after Mariah Yeater claimed that he was the father of her child.

The case was eventually thrown out and Bieber wrote the song 'Maria' about it as a bonus track for his 2012 album 'Believe'.

In his new autobiography Just Getting Started, Bieber will open up on the case - and he told US media that he wants to his thoughts out in the public. He said:

"It was all happening...people were always telling me 'You can't talk about it'. So for me, I wanted to be able to just say in my words, how I felt."

Bieber meanwhile also spoke about his maturity, with the singer believing that he has grown up in recent years. He added:

"I feel like I'm definitely growing up, I'm 18. I think when you're 18, you're not fully a man yet. I think you are becoming the person that you're gonna be, but now I feel like I have more responsibility in different aspects of my life."

Listen to Justin Bieber's 'Maria' below: