Phineas and Ferb's big sister, Candice, is determined to be the next Super American Pop Teen Idol Star. But her plans are foiled when Phineas and Ferb hit the stage with their ban. Then Candice's plans of becoming a movie star are laid to rack and ruin when Phineas and Ferb are chosen to direct her in her breakout role. Will she ever beat her brothers at their own game?