'iCarly' Series Finale: 5 Awesome Guest Stars On The Nickelodeon Sitcom (WATCH)

Goodbye, 'iCarly'! (VIDEO)
La primera dama Michelle Obama, segunda de izquierda a derecha, platica con Jerry Trainor, izquierda, mientras Miranda Cosgrove, centro, Nathan Krees y Jennette McCurdy, derecha, los observan durante una participación de la primera dama en el popular programa infantil "iCarly" en un capítulo que se transmitirá el 16 de enero de 2012. (Foto AP/Nickelodeon, Lisa Rose)
La primera dama Michelle Obama, segunda de izquierda a derecha, platica con Jerry Trainor, izquierda, mientras Miranda Cosgrove, centro, Nathan Krees y Jennette McCurdy, derecha, los observan durante una participación de la primera dama en el popular programa infantil "iCarly" en un capítulo que se transmitirá el 16 de enero de 2012. (Foto AP/Nickelodeon, Lisa Rose)

With Miranda Cosgrove going on to pursue a higher education and Jennette McCurdy transitioning into a starring role on her own spin-off show, "Sam & Cat," the end of Nickelodeon favorite "iCarly" has officially arrived. The show's hour-long finale special, "iGoodbye," will air on Friday, November 23.

In honor of the show's series finale this Friday, we got to thinking about some of our all-time favorite "iCarly" guest appearances. As Jennette McCurdy once said of Jane Lynch's guest appearance as Sam's mother, "The guest stars... bump up the cool of 'iCarly' drastically." And we couldn't agree more. Click through the slideshow below for five of the most awesome "iCarly" cameos, from the FLOTUS to the boys of One Direction.

Will you miss "iCarly" now that it's ending? What was your favorite guest appearance? Tell us in the comments below or tweet @HuffPostTeen!

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5 Awesome iCarly Guest Stars

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