Justin Bieber's manager always knew he would be a star.

Scooter Braun is responsible for masterminding the career of the 18-year-old 'Beauty And A Beat' singer and insists Justin had star potential from day one.

He told HollywoodLife.com: "I just knew. It's hard to explain, but I just knew.

"It's like falling in love - you don't look for it, it just shows up. Like when my gut tells me, I know."

Usher has also worked with Scooter to mentor Justin and he believes despite Justin's huge success, he has a lot more to offer.

He explained: "You know what, as a performer, I think he is striving to continue to be better. You know to be able to break away from dance and performance and really be able to continue to show his talent vocally and also as a musician."

Usher previously urged Justin to enjoy his fame and make the most of everything he gets to experience.

He said: "I see him and his crazy life and just tell him to enjoy it. When I started out, things were crazy so I say to Justin, 'Life is not worth it if you're not living it. Creative people are perfectionists and obsess over things. Sometimes we need to relax and have fun. So Justin, enjoy it as I went round the world three times before I decided to look up and see it. Absorbing your surroundings when you travel is so important.'"