Her voice is fantastic

I think she has a really unique voice.

I like the way her voice sounds a lot sweeter than most stereotypical rock voices, and I admire her vocal range for someone who doesn't really have any professional training (especially her head voice). However, she also strains a lot when she sings, which to me sounds the opposite of beautiful, and because of this I think Amy is pretty overrated compared to some other frontwomen who can literally sing opera arias on the side. Not saying Amy's a bad singer, but due to her lack of training she's definitely not the best, IMHO.