1. Hilary Duff was one of the original Disney Queens. Lizzie McGuire was (and is) iconic, although it wasn't all so great for Hil.
Back when she first started, Disney execs weren't at all impressed with her performance, and would only keep the show up-and-running if Hilary took acting lessons. That's got to be a blow to the self-esteem.
2. She also opened up about constantly being labeled as Lizzie, long after the show was over.
She was pretty sick of hearing it years later and said it was "super annoying," although now she admits that it's a blessing to have had that experience.