Baby I singer Ariana Grande thinks Justin Bieber needs ''help'' and shouldn't be punished for his recent behaviour.

The 20-year-old star doesn't believe anyone ''understands'' the pressure the Believe singer is under because of his global fame and thinks he needs ''help'' rather than heavy criticism for his recent behaviour.

Speaking to Access Hollywood, Ariana said: ''He's very isolated ... I don't think anybody understands. I don't think anybody could ever understand. I certainly don't, but I just think that people could be a little more sensitive to him ... he does need help, but I don't think he needs punishment.''

Ariana - who shares a manager, Scooter Braun, with Justin - is confident he will be fine because of the support around him.

She added: ''There's a difference between helping somebody and punishing them. It's gets to a point where all you need is a good talk with your family.

''I think he's in good hands and I don't think he's putting anything at jeopardy other than his health ... I just know that a lot of people are rooting for him to be healthy and that's like the most important thing.

''He's in really good hands. And yeah so he'll be fine.''