Hollywood Homely: The normally gorgeous Jenna Dewan (seen here◊) playing an unkempt nerd in the first half-hour of the film. They try their best, but she still looks good. They kind of had to cast a beautiful woman, though, given that the rest of the film calls for Tamara to be not just pretty, but a knockout.
Les Yay: Tamara taunting Keisha being getting close and touch-y feel-y with her while hypnotizing her into her control. Also, Tamara attempting to mind control Chloe by mockingly getting close to her. The fact that Chloe was originally supposed to be a Closet Gay only adds to the subtext.
Tamara's own death when she crashes her head onto the table. You actually see brain matter on it.
Roger's suicide including him slowly cutting off his ear, his tongue and eventually stabbing himself in his eye.
Tamara's father's incestuous fantasies towards his own daughter.
Literature Examples
They Wasted a Perfectly Good Plot: One issue raised by the reinterpreting Chloe as a lesbian character who may have liked Tamara is that the Sequel Hook of having someone grabbing the book in this version would have better fit Chloe than Kisha.