The Lizzie McGuire Movie synopsis
During summer break, Lizzie McGuire (Hilary Duff) and her closest pals head off on a school-sponsored journey to Rome. Before long she makes the acquaintance of Paolo Valisari (Yani Gellman), a local music sensation whose duet partner looks almost exactly like Lizzie. Since Paolo and his collaborator recently feuded, Lizzie agrees to stand in for the girl at a massive concert and pretend to sing while a recording plays. But when things don't go as planned, she must rely on her own vocal chops.