If you're looking for a detailed plot summary or review of the episode, I can suggest checking out entertainment blogs, Wikipedia, or fan sites dedicated to Victorious.

To confront him, the iCarly crew (Carly, Sam, Freddie, Gibby) travels from Seattle to Los Angeles. There, the two casts collide, leading to epic pranks, a massive party at Kenan Thompson’s apartment, and a final showdown performance of "Leave It All to Shine."

Includes extended scenes of Gibby in his "Roger Mole" disguise, including a moment where he breaks a kid's glasses while balancing quarters on his elbows. Extended Webcast: Features more of the