In the JP dance competition, Mary sings the lines: "Now you own this floor." But the mic is held on her waist.
In the JP dance competition, you hear Mary say "give me something with some edge", but her mouth is saying something else.
When Joey and Mary drive up as Dominique is leaving for Vegas, we hear Joey say "Maybe she took her broomstick" but his lips seem to form a slightly different line, perhaps "forgot" or "broke" instead of "took".
When Mary received the letter from the Academy of Performing Arts, she went back inside her room, and across the house a man can be seen walking and then slowly fading away mysteriously as Mary went back outside.
When Dominique goes to Vegas, she says that she's gone all weekend. Then, the same day that Mary and Joey start cleaning, Mary sees him with Natalia. And the morning after that, Dominique is already there. Meaning that she was only gone for a day.
In the beginning,when Mary goes to get in Tamie's car, Tamie's car is facing the driveway of the house, but when she pulls away you see that its facing the other direction.
JP's approach at finding the girl he danced with by having her tell him the four most played songs on the Zune would be impossible, for Zunes do not have a Top 25 Most Played like iPods do.
In the tape of Young Mary dancing to JP's music, she holds up a magazine and even though Mary is much younger in the video, JP is the same age on the magazine.
In the black white ball dance when JP dances with Selena Gomez, you can see that in the end of the dance when she swirls around going towards the twin sisters, the face of the girl dancing is not of Selena Gomez.
They refer to Mary's music player as a Zune. but the player that she hands to the DJ doesn't seem to be the right size to be even one of the small Zunes.