Justin Bieber's vocal producer, Kuk Harrell, has explained that the teen sensation's next album will be all about his "transition" from boy to man. 

Speaking to MTV News, Harrell revealed that although the 17-year-old 'Baby' superstar isn't ready to fit in with the likes of Usher, Justin Timberlake or Jason Derulo just yet, he is definitely moving away from the younger demographic as his fans are witnessing him "grow up" and progress musically:

"The only conversation we've had about Justin's album that we're about to do is it's really important that it's the proper transition because we've seen him [with] 'Baby,' now we're watching him grow up. There's a record in between."

Speaking about Bieber's latest record, 'Under The Mistletoe', Harrell added: "It gave everybody the opportunity to hear him, see him and get used to his voice changing. That was a huge thing going into this album."

"We were able to get a running start on where he's at vocally 'cause it's a natural thing. When his proper album comes out, everybody's going to really be looking at that."

Watch Bieber's video for Santa Claus Is Coming To Town, along with Mariah Yeater's first television interview, here: