Zach Galifianakis spanked Justin Bieber for having an ''attitude'' when he interviewed him for his spoof internet show 'Between Two Ferns' which is broadcast on comedy video website Funny or Die.
The 'Hangover 3' actor interviewed the 19-year-old pop star as part of his internet spoof show 'Between Two Ferns', and after Justin ridiculed his own public persona with a number of straight-faced answers, Zach took off his belt and whipped his butt with it.
The 43-year-old star began the parody Q&A on a gentler note, referring to Justin as a ''seven year old'', before going on to fire off offensive questions about the singer's ''public meltdown'', including quizzing him on him urinating in a bucket, smoking weed and his much derided entry in the guestbook at the Anne Frank Museum in Amsterdam, in which he suggested the Holocaust victim would have been a 'Belieber' if she were alive now.
By the end of the interview, Zach screeches: ''I don't like your attitude, to be quite honest. You're too young to be smoking pot and pee-peeing in buckets and driving up and down on the highway fast!
''I don't think your mum would really mind if a stranger whipped her son.''
Zach then unbuckled his belt and hit Justin three times with his accessory before returning to his seat.
He says: ''I'm sorry that I did that. I don't really think spanking kids is a good thing. But you're not a child. That's the point. You're not a child, so I can hit grown men with a belt.''
Justin enjoyed being part of the hilarious skit - which can be seen on comedy video website Funny or Die - and posted a link to the Q&A on his Twitter page.
He tweeted: ''Ladies and Gentlemen this is a very important interview. Very important ... In all honesty it might be the most important interview of this year (sic)£
Other stars to appear on 'Between Two Ferns' include Natalie Portman, Jennifer Lawrence, Anne Hathaway, Christoph Waltz, Naomi Watts, Bradley Cooper and James Franco.
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