During the first night Rosie's new location in Louisiana, the dialogue is overshadowed by the sounds of the native frog of Puerto Rico. There is a constant and loud "Coqui, Coqui" in the background. This little frog can only survive in Puerto Rico.
Chelsea is seen in the frozen yogurt store, and outside in the car in successive shots. These shots are not happening simultaneously, but indicate a passage of time to show how long Chelsea left Rosie to suffer in humiliation.
When the girls arrive at the bowling alley Ed says to Carter that he would get her shoes he said "5 1/5 coming up" but when they return the shoes the camera gets close to the real size on the shoe and it says size 7/8. Therefore Selena Gomez wears a size 7 or 8 shoe, not a 5 1/5.
The goof items below may give away important plot points.
Major Mason says that General Kane will be turned over to international authorities, for invading the United States and kidnapping the Princess. This is unnecessary, as Kane is captured at the scene of the crime in the States, and therefore can be prosecuted under American law, no foreign intervention needed.
Though it creates suspense for a possible sequel to the film, the ending does not make sense. How will Queen Rosalinda serve as an active field agent while performing the necessary duties of governing her country?