iCarly first aired in 2007 on the Nickelodeon channel
it follows a young girl called Carly who has her own website show called iCarly. And we follow all of her exploits in the series

The main sites link to videos of iCarly

Televisiononlineinfo.com
Sidereel.com
Yidio.com

I cant find any specific sites for the show that stream the episodes, what I have found are sites that are specifically setup for iCarly, but they are only trying to sell you something.

You can also watch on Itunes the link for this is:

You can also watch on Amazon the link for this show is:
iCarly - Amazon