"Bad Girl McGuire" is the eleventh episode of Lizzie McGuire.
Lizzie becomes friends with a bad girl and develops bad habits and a bad personality. Miranda and Gordo are concerned with this and decide to help Lizzie become her old self. Matt is given the freedom to stay up late at night, but after initial euphoria, he starts having problems with staying awake during the daytime. Miranda and Gordo create a short video to convince Lizzie to be good again.