These are all great! I'm not sure about the metal-y and harsh stuff. Hypnosis to me is always dreamy and gentle, and that first Fey song definitely captures that for me <3
I'll just throw in my two cents for a pop-y song (and thought I'd mention, it's a My Little Pony song before you click the link)
www.youtube.com/watch?v=jw3vWWu2_CMAnd who could forget Buffy the Vampire Slayer? (Maybe clearer if you know the story behind this song...)
www.youtube.com/watch?v=W1HvkHB0-RQEDIT:
Gah! I forgot about this one! I love singing this one along. It's from that Roald Dahl movie with the witches, no clue what it's called... One of them sings a song to hypnotise and steal away the children. Totally creepy I guess :T
www.youtube.com/watch?v=1t8-_pI1-9Q