One Direction's Harry Styles was left embarrassed when his bandmates convinced him he was delivering a baby on television.
American children's channel Nickelodeon got an actress to pretend to be pregnant and go into labour before she interviewed the band.
Louis Tomlinson, 20, and Zayn Malik, 19, were in on the practical joke.
Harry, 18, tried to calm the woman down before helping her with her breathing exercises.
He shouted: "Why is no-one here? Can somebody help us?"
Even though he panicked throughout the ordeal, he couldn't resist laughing when the deceiving presenter announced she had "farted".
Liam Payne, 18, also fell for the charade and rang the woman's husband, who was also fake.
Niall Horan, 18, simply sat away from the situation looking dumbfounded.
After several minutes, the woman eventually revealed: "You've all been pranked by Nickelodeon."
Pleased colleagues Louis and Zayn high-fived each other once the prank was revealed as poor Harry buried his face in his hands.
Harry said afterwards: "I was actually thinking this is going to be a great press story. One Direction deliver a child!"
- Bang! Showbiz
The Australian site cited a 'heightened threat level' as the issue.