Yeah BABY!  World famous tween reporter Piper Reese is on the iCarly set with Jennette McCurdy AND Nathan Kress!  NOt only that...there's a super-kewl 3rd iCarly star (and a special friend of ours) is in this episode too!  It's the amazing Roxy Hunter...er...Mandy...no...it's Aria Wallace!  3 super awesome stars for the price of one in a jam-packed Piperific 40th episode!