Help me with finding a song or its video

it is about a girl who is getting insane. she is white female sining rap and rock first she walks on d street then ends up singing on the roof of some building and a band is behind her doing their job.

btw this was her first official video clip.

so plz if u have anything similar u could help me :)
thanks

The only video I can think of is Evanescence - bring me to life. (: that might be it.

No its not Evanescence...she spends her time climbing up the side of a building and then falls off...it sounds more like Avril Lavigne 'Im With You'. Shes alone walking round the streets at night...sometimes its only her, sometimes theres other people...they just dont see her.
Although it could also be 'My Happy Ending', also by Avril Lavigne, where she goes through all the good memories of her and her ex BF, and goes onto the top of a building and like rocks out with her band.
hope I helped x
if its not right I apopogise but that was my take on your description, but check them out anyway :) x