This wonderful CG cartoon--a loose adaptation of Hans Christian Andersen's "The Snow Queen"--is Disney's most Disney film in ages. It's an unapologetic, old-school musical filled with funny sidekicks and not one but two princesses. Kristen Bell ("Veronica Mars") holds her own as the plucky Nordic princess trying to help her winter-conjuring sister. But Broadway baby Idina Menzel is a force to be reckoned with at the terrified young woman with the snow-throwing powers. Josh Gad (The Book of Mormon) steals all the laughs as a talking snowman with a sunny disposition. 108 minutes PG.