She has a really whiney voice. It's a real issue to me. I'd love her if it weren't for that.
EDIT: At her judge's house that is. Her other performances were merely passable, but not whiney. Her judge's house could have been amazing if it weren't for that whiney voice.
Drew is definitely one of my favorites (along with Josh and Leroy) and she is being touted as the one to beat by many critics who regularly review American Idol and now the X Factor.
Simon sees dollar signs every time he looks at her. There are many similarities to Janet so I think it's pretty clear that Janet is the one from the UK that he has is eye on.