The 'What Makes You Beautiful' five-piece cemented their chart success by starring alongside Miranda Cosgrove in their own special episode 'iGo One Direction'.
It will air in the UK next week and features Harry Styles facing a battle with illness after he catches a bout of Jungle Worms from Carly (Cosgrove).
Harry Styles gets Jungle Worms - watch clip:
One Direction are currently visiting Australia and have announced plans to return for an arena tour, following an overwhelming reception from fans.
The news follows their record-breaking chart success in the US and the announcement that they will headline a gig at New York's Madison Square Garden later this year.
One Direction perform on iCarly - watch clip:
Watch 'iGo One Direction' on Monday, April 16 at 5.30pm on Nickelodeon.
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