It's a bit hard to categorize this movie. For a horror or revenge movie it's too soft, for a thriller is doesn't have enough suspense.
It's reasonably entertaining, because the premise is fairly original (young woman wants revenge on the members of a rock-group that she holds responsible for her little brothers death, due to a stampede after one of the group's concerts turned into chaos), and you want to find out if and how the (maniac) heroine gets her way.
Biggest disappointment is the script. First of all there is no-one to relate to. Our sympathy should obviously lie with the girl who has all the right in the world to blame the boys of the band and their manager. But we all too soon find out that she's a psychopathic lunatic who soon looses all credibility. And did the writer fell asleep after the first ten pages? As in every other specimen of this genre the murders should get bolder and more spectacular with every new victim. But here they only grow more and more boring: a drowning, a knife-stab, an electrocution (by way of the guitar, okay, that's funny!) and the last three (!) all in the same extremely lame and uneventful way: by smearing faces with plaster (and making a mask out-of the imprint). The final show-down at the house of our rock-hero is ludicrous and as corny as can be, you can predict the whole scene, with the loyal (pregnant) wife shooting the lunatic and then the supposed corpse getting up in one final gasp of life to take the definite bullet.
The acting is reasonable. The lead singer is played convincingly by Hal Ozsan, in the right mixture of care-free macho and sensitive songwriter. He's good-looking and I guess he's a good actor, but this is not the stage where he can show it. With Taryn Manning as the stalker-out-of-hell it's pretty much the same: you can tell that's she's far better than what they make her do here. But all the same she's convincing enough as the killer. Maybe her physique is not so threatening (rather petite, like a skinny Christina Ricci), but in a calm and deliberate way she radiates a lurking schizophrenia that at times comes out in sudden fits of actually hair-raising rage. Eric Roberts can play the band-manager with his eyes closed and his hands in his pockets, it's like he doesn't have to do anything, just be himself and still come-out perfect as the dominant, self-righteous money-maker. The other band-members and their groupies are just in to add-up to the body-count.
Come to think of it: the whole project impressed me as if no-one really believed in it or wanted to take it seriously. Remains the question: why even bother? Anyway, for a positive closure, the musical score is absolutely great, this supposed band with actor Ozsan as their lead-singer really played, and boy, do the rock!!! And many of the songs appear to be written by Ozsan himself. So while the movie isn't one to think twice about, I'll definitely go and try to get hold of the sound-track!!