I remember seeing a movie about five years ago I think. It must have been from the '90s or '00s. It was about a girl moving to a new town. The popular guy in the movie started to notice her, and hitting on her, and the guy's girlfriend gets jealous, and the movie ends with her killing the new girl.
The thing that really stuck in my head and has bothered me ever since was how she killed her. She cut off her head, but placed it on the neck where it should be, and covered it up with a scarf or something, so when her mother came home, the new girl was laying on the floor, still alive but her head was not actually attached to her body anymore.
The new girl was a redhead I think, and the jealous girlfriend was blonde. I remember one scene where they were at a party, and there was a pool and the blonde girlfriend sees all the boys admire the new girl in her bikini.
Do you know what movie this is from?
UPDATE: NAME THAT TRAUMA SOLVED! Reader chopmeup is on a roll and answered this one with THE STALKING OF LAURIE SHOW.