You Again (2010)

Marni has bad memories of high school, but her life has improved since then. Still, she is outraged when her brother announces he is marrying Joanna, a high school classmate who bullied her. Marni plans to unmask and expose her in front of her family, though she's not the only one who draws attention to herself, as Joanna's aunt Ramona was a rival of Marni's mother in her youth. A fun comedy with a great cast of actresses: Kristen Bell, Jamie Lee Curtis, Sigourney Weaver and Betty White.