Continuity mistake: During the song at the end, there is a zoomed out shot of the entire crowd. You can see Phineas and Candace both screaming with their hands in the air, their eyes closed, and Phineas is not holding a camera. When the camera instantly cuts to a close up of them, both of them have their mouths closed, their hands down, their eyes open, and Phineas is holding a camera.
Continuity mistake: During the end of the episode, Phineas is video taping his parents, but what he is recording is a different angle that what is being shown on the screen. From Phineas' angle, the camera is only showing the back of his mom's head. However, the big screen above the band shows that the camera angle can see both of his parents' faces.