Sunrise co-host David "Kochie" Koch revealed on Sydney radio station Mix FM that Canadian popstar Justin Bieber told a Sunrise floor manager "don't ever f**king touch me again".

Koch was interviewed by Mike E and Carmela in the Mix breakfast show. There, he said, "We had him on and he was a thoroughly nice bloke, really decent guy."

"Our floor manager was directing him to where he was about to perform and he turned around to Nick and said 'don't ever f**king touch me again' and Nick went 'What?'," Koch told the Mike E and Carmela in the Mix breakfast show.

"And then his sound guy, his audio guy said 'don't take offence mate he tells us that all the time'.

"So I was a little disappointed in that... I thought maybe someone needs to drag you aside and give you a bit of a slap."

Bieber denied Koch's claims on his Twitter account, writing, "Family time with my mom couldn't come at a better time....I was raised to respect others and not gossip...nor answer gossip with anger.

"I know my friends family and fans know the person I am. Hearing adults spread lies and rumors is part of the job I guess."

In another report, a antrum was once again pulled by the 16-year-old in an interview in UK.

PerezHilton.com says that when Bieber was asked about his tattoo, he gave the radio presenter a finger and walked out from the interview.

Late last month, police had to cancel Bieber's only Australian performance when several young fans were crushed in a hysterical 4000-strong crowd.

He was supposed to perform at the overseas passenger terminal in Circular Quay where many of his teenage fans have already camped out the night before.

The venue for his performance was moved to the Sunrise studios in Martin Place in central Sydney.