April 7, 2012 at 8/7c.
they already did after a year in the making
One Direction was a guest star at the Nickelodeon TV Show iCarly. The episode is : iCarly - iGo One Direction
One Direction performs in one of the episode of icarly
April 7th 2012 at 8 PM (US time) 1am UK time
www.nick.com and go to the icarly stuff then click episodes then go to full episodes then look for igo one direction
Last year.
ICarly
iCarly on nickelodeon
Zayn
it already came out.
They made an apepearance on iCarly in the episode iGo One Direction.
iGo One Direction