Scream 4 ending explained (spoilers)

[JamesNelty]

Jill and Charlie are the killers. Jill kills Charlie with the intent of framing him for the murders and making it look like Jill is the hero, just like Sidney was. Jill stabs Sidney to keep her quiet and then makes it look like Charlie killed Sidney and Jill saved the day. Jill is taken to the hospital, but finds out that Sidney survived. She tries to kill Sidney, who eventually electrocutes her and shoots her. But the media reports that Jill is a hero, meaning that she got what she wanted.