Starring: Ashley Tisdale, Brenda Song, Cole Sprouse, Dylan Sprouse
It's a Mad, Mad, Mad Hotel - S1-E12
Other mistake: In the episode "Its a Mad, Mad, Mad Hotel", when Esteban has his dream of becoming rich and London becoming his "Bell Girl", he calls the hotel "Hotel Esteban, but London's uniform still has a "T." When it cuts there is an "E" on the front desk.
Visible crew/equipment: At the beginning, you can see studio lights reflected on Zack's guitar during the song "Schools Out". (00:00:55)
Trivia: Maddy starts to film her movie and Mr. Mosby tells her that he is ready. Look at what he does right before she starts filming. He chants "Mah, mah, mah" and does the same thing Ashley Tisdale does in "High School Musical" before performing.
Question: What Happened to Muriel? Around season two she disappeared.
Answer: Keep in mind, Muriel wasn't very popular. So the writers/directors must have thought it'd be a good idea to let go of the character. No one seems to be complaining.