Watch the episode where Raven has a vision where she thinks Chelsea and Eddie are about to kiss. There is a part where Raven sees the two passing a note back and forth. Chelsea writes on the note, then passes it to Eddie, who also writes on it, but then drops it on the floor, and the teacher confiscates it. So the note should have a line written by Chelsea, then another written by Eddie. But when Raven reads it, there is an extra little line at the end ("Can't wait!") written by Chelsea. There is no way that last little bit could have been added, unless Chelsea wrote on the note w/ some hidden telekinetic powers or something.