Well, 'A Cinderella Story' and 'Lizzie McGuire' have no obvious link. They belong to different genres and target different audiences. 'A Cinderella Story' is a classic fairytale adaptation, while 'Lizzie McGuire' is a coming-of-age story.
Melanie McGuire is the central figure in this story. She was likely involved in some sort of criminal case that led to her being associated with the 'Suitcase Killer' moniker.
Lizzie Velasquez is a remarkable woman. She has a very rare condition that makes her look different from most people. Despite facing a lot of unkindness and bullying in her life, she has become an inspiration to many.
Well, it's a bit of a mix. Maybe it was inspired by real incidents, but it's not a straightforward account of actual events. There could be creative liberties taken to make it more engaging.