Justin Bieber's mum: I worry about his bad behaviour

Pattie Mallette - Justin's mum - has now said she worries about his recent spout of bad behaviour - which includes threatening photographers, urinating in a restaurant and annoying neighbours by speeding around local streets in his Ferrari.

She said: "Every parent worries. I text and call him every day."I definitely want to know everything that he is doing and what he is going through so I try to talk to him as much as he’ll let me.

"I mean, he’s on tour and being pulled in a million different directions but we talk as much as he is able."

Pattie, 37, has previously spoken of her own difficulties - including experimenting with drugs - and admits she finds it hard to talk about her son's recent antics.

She added to People magazine: "A lot of people might think that I have my head in the sand or that I am oblivious to the things my son is doing.

"I know who my son is and I don’t always agree with every single thing that he does but I don’t necessarily have to address that with everyone else.

"He’s my son and I have to respect he is not going to want me going around being ‘that mom’ talking about his behaviour."