Justin Bieber hangs up on radio interviewer after Harry Styles 'mum' joke goes wrong

Justin Bieber ended a US radio interview after the host made a joke about Harry Styles and his mum.

Well, actually it's a bit more complicated than that.

On Detroit's radio show 'Mojo In The Morning' on Thursday, interviewer Thomas 'Mojo' Carballot mentioned Justin's friendship with One Direction and then said, "Do you worry about Harry [Styles] around your mum since he likes older women?"

Justin responds with, "I think you should worry about your ma, bro," and laughs.

To which the interviewer replies, "I should worry about my mum? Justin, my mum's dead so unfortunately I don't think that will work."

Then there's this horrible silence...

The LONGEST SILENCE EVER.

And then Carbollot goes, "This is where the interview goes really south, right Justin?"

And then there's a dial tone.

Awkward.

They're soon told that Justin was upset with the question and won't be calling back.Listen to the interview!