Nick stars with Tumblrs.

Nickelodeon Stars

• Ashley Argota [Bucket and Skinner’s Epic Adventures/True Jackson VP] - http://ninebutterflykisses.tumblr.com/ 
• Avan Jogia [Victorious] - http://atjogia.tumblr.com/
• Ariana Grande [Victorious] - http://arianasings.tumblr.com/
• Elizabeth Gillies [Victorious] - http://eegillies.tumblr.com/
• Kelli Goss [Big Time Rush] - http://kelligossipgirl.tumblr.com/
• Savannah Jayde [Big Time Rush] - http://typicallysavannah.tumblr.com/
• Jennette McCurdy [iCarly/Best Player] - http://jumpingigawatts.tumblr.com/
• Malese Jow [Big Time Rush, The Troop, Unfabulous] - http://xomalese.tumblr.com/
• Dillon Lane [Bucket and Skinner’s Epic Adventures]- http://dillonlane3.tumblr.com/ 
• Katelyn Tarver [Big Time Rush] - http://thisiskatelyntarver.tumblr.com/ 
• Miranda Cosgrove [iCarly/Drake and Josh] - http://miranda.tumblr.com/ 
• Keke Palmer [True Jackson VP/Winx Club/Rags]- http://realkekepalmer.tumblr.com/ 
• Matt Bennett [Victorious] - http://mottbonnott.tumblr.com/ 
• Ciara Bravo [Big Time Rush] -  http://ccbravo.tumblr.com/ 
• Lulu Antariksa [How To Rock] - http://misslulumarie.tumblr.com/ 
• Victoria Justice [Victorious] - http://victoriajustice.tumblr.com/ 
• James Maslow  [Big Time Rush] -  http://jamesmaslow.tumblr.com/ 
• Carlos Knight  [Supah Ninjas] -  http://iamcarlosknight.tumblr.com/ 
• Leon Thomas III* [Victorious] -  http://leonthomas3.tumblr.com/ 
• Madison Pettis* [Life With Boys] -  http://simplymadisonpettis.tumblr.com/

Degrassi Cast

• Aislinn Paul - http://aislinnclaire.tumblr.com/
• AJ Saudin - http://bobswagget.tumblr.com/
• Alexx Benoit - http://alexxben.tumblr.com/
• Alex Steele - http://alexarosesteele.tumblr.com/
• Cassie Steele -  http://cassandraraesteele.tumblr.com/
• Chloe Rose - http://headlessbee.tumblr.com/
• Jordy Todosey - http://odditie.tumblr.com/

* - New/Just Added

All of these tumblrs have been confirmed from the stars official twitters/sites etc. Any other blog that claims to be them are not real.