This album is just my pleasure to hear because I've been a fan of justin for so long and I just love it.
His voice doesn't have any changes but his singing style and the way he sings the riffs through out this entire album definitely did change. I mean that's how he is, he's been through a lot of changes and he's singing style did change too.
Overall I want to say that the album is Justin bieber's album, it will be the best and he's the best..