Gustavo sits at the piano working on his song while Katie sits in the background writing. At one point before she covers her ears, the expression on her face changes instantly from one shot to the next.
While Kelly talks to the guys at the hot dog cart, the red binder under her left arm changes position several times. Pay attention to where the binding and zippers are.
Right at the end of the scene where Kelly talks to the guys at the hot dog cart, the drink in her hand instantly changes into a hot dog.
When Katie reads the almost-final version of her report to Gustavo, she folds the cover of her notebook backwards, but it's opened outwards right before she closes it.
Camille couldn't have really been auditioning for Degrassi because Degrassi auditions are in Toronto, Canada, and to be eligible, and for funding reasons, you must be a Canadian citizen.
When Freight Train carries Kendall out of the pool area, there is a female extra shown in a lounge chair in the foreground, as Freight Train and Kendall are exiting the pool area, that same female extra is shown walking into the pool area.