Stupidity: When Gail shoos Luke off the first day, in fact nobody accompanies him to the door and they discuss the evil plans when he's not even gone nor they even check he is, they just go ahead with the script. It's a rather odd dynamic, very rushed and movie logic-like. Or theater logic, since it's a typical 'exit stage left' moment.
A Cinderella Story: Once Upon a Song (2011)
1 stupidity
Directed by: Damon Santostefano
Starring: Lucy Hale, Freddie Stroma, Missi Pyle, Megan Park
Revealing mistake: When Victor pulls the towel off Katie, she ends up facing him, and then instead of resisting, holding the towel or shoving him off (he's a kid, she towers over him) she blatantly spins away to be stripped and literally walks off the door so he can lock her out. Can't get much more obvious than that. (00:16:20)