Miss Ungermeyer (Alex Borstein) takes her high school class on a trip to Rome. Whilst there, Lizzie McGuire (Hillary Duff) is mistaken for one half of a successful singing duo and skips the class tours for secret adventures with the band manager.
After an embarrassing performance at her high school graduation Lizzie McGuire, Hilary Duff, takes off for two weeks in Rome with a group of classmates, including Kate, Ashlie Brillault, who thinks she knows everything about being a girl, the rather 'duh' jock Ethan, Clayton Snyder, and Lizzie's greatest friend and supporter Gordo, Adam Lamberg, who secretly loves Lizzie but accepts his role as the loyal nerd. The expedition is led by the jackbooted Miss Ungermeyer, Alex Borstein. In Rome Lizzie is mistaken by Paolo, Yani Gellman, for Isabella, the other half of his successful singing duo. Opting for secret adventures with Paolo instead of tours with the class Lizzie is taken aback when Paolo asks her to impersonate Isabella on stage. I'm sorry, I have too much respect for 6 to 14 year old girls to say anything even vaguely praising about this film. The screenplay is ludicrous, the performances some of the least convincing I've seen from any age group, anywhere. The design, both clothing and production, totally uninspiring. The director was Jim Fall. I never talk to David Stratton during a screening but I couldn't resist leaning over and whispering 'How can they do this to Rome?'