[Z]

It would be highly unprofessional for Fearne Cotton to grab someone and insult them, presumably in front of a camera as it was an interview setting, as the article suggests. So if it's true, there were witnesses to the incident - camera people or microphone people at least; I won't believe it until I hear it from someone like that. Having said that, Fearne Cotton isn't the most professional of people, I've seen a few interviews where she comes across as completely false and crap at her job, but despite that, I doubt she'd grab someone by the arm and insult them. I can easily believe Justin Bieber being a little twerp side of the story though - teenage boy going through puberty while experiencing fame and attention from every angle? Definitely likely to explode at someone for no reason.