Sunday 10th March 2013 by Adam Tait | Photos by Wenn

Tags: Justin Bieber

Justin Bieber’s ‘worst week’ in London has been well documented - from his tardy behaviour to his bizarre attire to an unpleasant altercation with a photographer. But it has now been suggested that his recent behaviour is a result of some dodgy new mates.

Bieber has reportedly been turning to Will Smith, father of his mate Jaden, for parental advice during his time in the UK, but the Mail Online has today revealed that a behind-the-scenes power struggle between the ‘Baby’ star’s management team and a collection of new friends is to blame for his recent erratic behaviour.

While Smith’s influence has been praised by those close to the pop sensation, others close to the singer say the influence of rappers Lil Twist and Lil Za is increasingly leading Bieber down a dark path.

“You have to look at the people he is hanging out with,” a Hollywood associate recently told the Mail.

“They are very distinct from the group of professionals around him, like his manager, who do a terrific job guiding his career and caring for him. Justin’s issues really started when he started hanging out with this undesirable crowd.”

Lil Twist and Lil Za - two relatively unknown rappers - were both thought to have been in attendance when Bieber was photographed with what looked like a joint at a party in California.

The day before that Lil Twist was pulled over while he drove Bieber’s £120,000 Ferrari, which led to a photographer being killed has he tried to snap the incident.

Others have suggested Bieber’s split with girlfriend Selena Gomez that led to Bieber embracing the party lifestyle.

Bieber's looking a little less angelic in some eople's eyes after this week

A friend of Selena’s told the Mail: “Selena was a calming influence on Justin. She is two years older than him and he listened to and respected her.

“Everyone is hoping this recent behaviour is just growing pains and not the start of a more serious problem. Only time will tell.”

Robbie Williams recently said he thought Bieber was heading for inevitable melt-down, citing the problems he himself had had as a young pop star.

Below: Justin Bieber hides fan shame with gasmask in London