Don't get caught up in that opera style, there were around 5 styles of singing in that song.
Here one with pop and rock stylings and an insane scream near the end.
She also has a straight ahead rock project called Northward if you want to hear her sing more traditional rock without any of the operatic stuff. As expected, she sounds amazing. I can't say I loved the songs a lot....it's kind of in the Alterbridge camp. Good music to drive to, but not really for a deeper listen.