kelly clarkson, drunk on stage, singing g'n'r with some metal band

sure, this vid has gotten around a bit but i really like it. partly because i like kelly clarkson and partly because i like metal classics. watch in amazement as kelly gets spotted in the crowd, pulled onto stage with her bf(?)--the singer of yellowcard--and they engage in some "crowd participation."

here's my question: who's the band? i can't figure it out. almost like they're some phony las vegas "metal variety show" -- the banter and personalities seem so contrived and over the top, and their repertoire of songs seems a little fishy. but i guess that IS metal...