Other mistake: After the final rain dance, "Chase", goes towards "Andy" to kiss her. His T shirt and jacket are completely dry, although his face is dripping raindrops and everyone else's clothing is soaked.
Other mistake: In the scene where ADD is playing Rock Band in the tour bus, the game continues to play by itself after Matt, Curtis and Amelia are interrupted by a phone call from their manager informing them that they will shoot a music video.