'Boyfriend' heartthrob Justin Bieber has admitted that he wants his new record 'Believe' to show the world how he has matured as an artist.

The 18-year-old Canadian superstar released his brand new album earlier this week, which has already debuted at No.1 on the official UK Top 40 albums chart, and explained to USA Today that it showcases his growth:

"I took nearly eight months to record this album, now it's back to the grind, which I enjoy. I'm maturing, and so is my music."

Bieber also added that he won't get lazy about his stardom now that he's at the top and plans to continue working just as hard to keep his fans, as well as himself, happy:

"Once you're on top, people wonder when you'll fall. I have to keep working hard."

Watch behind-the-scenes footage from Bieber's 'Believe' dance rehearsals here: