Ghosted

"Ellie Charles is the smartest, prettiest, best-dressed, and most popular kid at Lincoln Heights Middle School. She's also the meanest. She knows it, and she uses her reputation to keep herself at the top of the food chain. But one night, just before her school's winter dance, she encounters a ghost who might change everything. This ghost--of a girl dressed all in black--leads Ellie through her past, present, and future. Can what Ellie sees change her ways--or even save her life?"--Publisher.