Reign (2015)

The bond between two teen-aged girls - one popular, one not - is tested and brought to a crisis point when an intimate moment between them is caught on video, going viral through their school. Terrified of losing her status, popular Brooke turns on Charlie, denying their friendship, and becomes one of the bullies who have made her every day a misery. Devastated, Charlie takes a desperate measure to make Brooke understand her pain.