The album's producer Mike Posner, who has his own solo career with hits such as "Please Don't Go," worked with Bieber on the debut single, "Boyfriend".

The result is a slow tempo beat with Bieber softly rapping "If I was your boyfriend, I'd never let you go, I can take you places you ain't never been before." The song, released in March, peaked on the U.S. Billboard Hot 100 singles chart at No. 2.

OLDER BUT STILL YOUNG

While "Boyfriend" reveals an older Bieber in a more intimate setting, Posner said "Believe" wasn't meant to show Bieber all grown up just yet.

"I wanted to make songs that were reflective of who Justin was when I met him in the studio, not when he was 13. We're not trying to grow him up too much because he's not 25, he's 18, but he's a young man that's living life and having fun, and the music reflects that," Posner told Reuters.

Moving away from pop, Bieber fuses electronic dance music with R&B throughout "Believe," specifically in tracks such as the club-friendly "All Around The World," which sees Bieber team up with rapper Ludacris. and "As Long As You Love Me" featuring another rapper, Big Sean.

The singer embraces R&B influences in songs such as the romantic "Catching Feelings," "Right Here" featuring fellow Canadian star Drake, and the Motown-inspired upbeat track "Die In Your Arms."