The reporter introduces himself to Miley and Lilly as being from the Des Moines Gazette. The actual name of the newspaper is Des Moines Register.
When Miley and company arrive in Washington, they take the Metro, but the establishing shot is actually that of the New York City subway - specifically, the 6 train - and the inside set is also modeled after the NY subway.
Lilly says that sometimes she wishes that she had a brother. But in "Miley Get Your Gum", she told Miley that she loved her brother's hamster.