Justin Bieber pretended to be Akon's illegitimate son.

The 16-year-old singer prank-called the music star after stealing his number from the phone of his manager Scooter.

Scooter recalled: "He was like, 'Daddy, why don't you love me?' It really scared the s**t out of Akon!"

Justin was later asked about his telephone tricks by a fan on twitter and admitted making joke calls to people is one of his favourite pastimes.

He tweeted: "R u Kidding of course I do!! I prank everyone!! No 1 is safe :) (sic)"

Although Justin is constantly surrounded by his management, bodyguards and publicist, the 'Baby' singer has also admitted he sometimes feels overwhelmed by the devotion he is shown by his friends.

He told New York magazine: "It's definitely amazing to me that I have such amazing fans. But, like, at the same time, I mean. I'm claustrophobic, really bad. I don't like to be closed in."

Despite his comments, the singer is keen to stay close to his admirers, particularly his female fans.

He tweeted: "hello girls... i think we should all hang out very soon... all of us... together... often. ;) (sic)"