TV Shows: Drake & Josh (2004-07), iCarly (2007-12)

Miranda Cosgrove, 19, has worked for Nickelodeon for a solid eight years, but that will come to an end when iCarly airs its final episode in November. Miranda played a scheming younger sister on Drake & Josh, but really came into her own as the title character in iCarly, about young girl who does a show on the Internet. (Not that kind of show, creep.) Cosgrove is listed in the Guinness Book of World Records as the highest-paid child actor of all time.