Lizzie McGuire (2001)

Season 1: Episode 5

Lizzie is dissatisfied with being an ordinary ""B"" student and is looking for something at which she can excel. Surprisingly, she finds out in gym class that she has a real talent for rhythmic gymnastics. But she thinks the sport is stupid and is ambivalent about competing. She trains hard and goes to the regional competition, where a jealous Kate tries to sabotage her performance. Miranda and Gordo help foil Kate's plan and Lizzie wins first place. Her parents are proud but Lizzie decides to give up the sport and go back to being her ""ordinary"" self.