In the iCarly episode iToe Fat Cakes, Carly is seen watching a part of this episode (specifically, a part with Megan in it). Megan and Carly were both played by Miranda Cosgrove, so Carly was basically watching herself.
This is one of the most hated episodes of the series due to how maliciously Megan treats Drake and Josh throughout. Once again, she wins at the end of the episode while the duo gets no happy ending whatsoever. People also blame Walter and Audrey for believing Megan's stories over the duo's, despite the fact that there's absolutely no proof they were responsible for the kitchen explosion mess.
In the Spanish dub, when Drake mispronounces South America, he says "Sudamerica," which is Spanish for "it's only available where America sweats."
When Drake and Josh enter Megan's room and find out she's entered Salsa Fest, the picture frame that opens her surveillance panel is open.
While Walter, Megan and Audrey watch TV right before the salsa explodes, if you listen carefully enough, you will hear that they are watching the Zoey 101 episode "Defending Dustin."