Coming as no surprise to followers of ratings, but this is a great treat to fans: iCarly has been renewed for a fifth season! Production on Season 5 will begin next year.The show has performed strongly and steadily for Nickelodeon in the four years it’s been on the air. The most recent “landmark” episode, ‘iOMG,’ got 7.4 million viewers, becoming the highest rated show on cable last week. Lead star Miranda Cosgrove has said that she plans to end the show within the next few seasons mainly because she’s been on the show so long and because she’s growing up into adulthood, and iCarly of course is a kids show. Cosgrove turns 18 on May 14.