When the iCarly crew invite their biggest fan, Mandy, to the set of the show, they realize that she is more than they bargained for. Meanwhile, Spencer joins a rock band.
Carly invites her biggest fan to watch the show live, but it turns out the girl is a bit too obsessed and now the kids can't get rid of her. Meanwhile, Spencer finds out his band tolerates him only so they can practice in the apartment.