Okay, I dislike to read that Hilary's being dragged.
So, here's my opinion:
I agree that Miley has had more success than Hilary, even at their peaks. Being a Hilary fan, of course I'd prefer Hilary and will be at her support, but with chart peaks, Miley really outpeaked Hilary. She also outsold Hilary, except on albums.
So, moving on, it's irritating that Demi and Selena are being compared to Hilary success-wise and thinking that they are already ahead/coming ahead of her. Come on. Even though both girls' sales are continuously increasing (that's arguable though), they have never really peaked in a remarkable level. i wonder how they will do if they don't have any 'Give Your Heart A Break' and 'Heart Attack' or 'Come and Get It' and 'Love You Like A Love Song.' Will they be able to sell albums? Will they even cross 250K? Let's be real.
Hilary did it with Metamorphosis even with So Yesterday and Come Clean only peaking top 30/top 40. Hilary did it with her self-titled with Fly not even charting in the Hot 100. Hilary did it again with Most Wanted with Wake Up peaking at #29.
I love Demi, she's really my princess with Hilary's hiatus, but we cannot compare. And with the vocal issue, yes, Demi's outstanding, but Hilary's not voiceless. Selena Gomez does not have a good voice, and she's pretty similar to Hilary vocally, but then they are not voiceless. They can still carry a tune.