Justin Bieber has given fans a glimpse into his rehearsals.

The teen star has been preparing for a performance at this Sunday's (May 20) Billboard Music Awards.

He uploaded a video onto Twitter of himself and his dancing team practising some moves ahead of the big event.

He tweeted: "Rehearsal. #FOCUSED."

Bieber meanwhile has been speaking more about his upcoming album 'Believe', stating that it will "open doors".

He went on record to say that he has been going for a more "mature" sound that will "appeal to all ages".

Watch Justin Bieber's rehearsal clip below: