They stay at the Tipton in Los Angeles, which is largely identical to the one in Boston, and they meet the cast of the show: Zack and Cody are portrayed by two young boys, Carey by a young lady, Maddie by a pretty girl who pretends to like her, London by a boy, and Moseby by a tall man who talks with street slang.
After being kicked out of the stage, Maddie and London, who notice a star they like, dress in costumes for the film he is to be in in order to sneak onto the set.
The director assumes them to be stunt doubles, which they initially refuse but eventually go along with because they believe are to kiss the star at the end.
Back at the taping, Cody becomes nervous and forgets his lines when he finds out how many people are in the audience.
Note: The interior scenes for the Los Angeles Tipton, as well as the Hollywood set-version for the soundstage was actually filmed on the exact same set that's used to represent the Boston Tipton for the entire series (as the whole series was filmed in Los Angeles).