This guy, the lead singer for Beast In Black, is just an insane vocalist. He has done a whole bunch of vocal covers on his YT channel, altho it's been a while. I picked this one even though this is probably a song not many are familiar with, because his falsetto is absolutely perfect. The original singer of this was Tarja Turunen, just an amazing singer in her own right.
View: https://www.youtube.com/watch?v=nfZxu1aQzp8