Help
 

First of all I'm sorry if this is not the right place for this thread but I'm new here and I'm looking for help.

Few years ago I've watched a music video on YouTube, and now I simply can't find it because I don't remember the name of the song, the artist neither the lyrics I only remember about the video.

The artist was something similar to Hollywood undead I think.
The song begin with some kind of back vocals of a few children, in the video I think that appear 3 little girls. The video was recorded in some kind of hospital or mental institution and during the video the walls appear written with blood.

Does anyone remind a video like this?

I appreciate the help.