lol no offense man but I think if you took LP's lyrics and wrote them from a woman's perspective you'd get something similar to Evanescence. Evanescence isn't emo, they're like metal/goth/alt. rock. They happen to be MTV-friendly because they have a girl for a singer who just happened to become a huge pop culture icon. I'd say nu metal but that implies rapping, which they don't have in any songs other than Bring Me to Life. Emo (as a genre of music, I personally hate the word when used to describe anything other than music) would be like Fallout Boy, Hawthorne Heights, Taking Back Sunday, Dashboard Confessional, My Chemical Romance, Underoath, Brand New, Panic at the Disco...etc. Most of which suck in my opinion.
I don't like their new single though, it's all poppy and stuff. =/