After Tori finishes recording Sikowitz she puts her PearPhone in her back pocket, but when she turns around, the PearPhone isn't in her back pocket.
In the song 'Shut up N' Dance', before Cat and Tori sings 'Cause I can't wait no more', Beck is on the staircase. But when Tori and Cat sings the lyrics, Beck ends up by the Piano.
In the Wizard Of Oz scene, Cat's ruby cell phone automatically disappears out of her hands, but when Robbie comes as a scarecrow, the phone appears again.