Possible Clues:

• Girl's name; see oil (anag)
• Kid-lit girl who lives on the "tippy-top floor" of the Plaza Hotel
• Kid-lit girl who lives on the 'tippy-top floor' of the Plaza Hotel
• Fictional 6-year-old at the Plaza Hotel
• Kid-lit girl with a dog named Weenie and a turtle named Skipperdee
• Kid-lit character who lives in the Plaza Hotel
• Kay Thompson's brat
• Kid-lit kid with a turtle named Skipperdee
• Title 6-year-old of 1950s children's literature
• Name of girl I see misrepresented in contents of blog? Just the opposite