Alice Hoffman and Hollywood haven't traditionally made a great fit if the screen adaptations of her novels "Practical Magic" and "The River King" (which went directly to video) are of any indication. [...] things are looking up with the arrival of "Aquamarine," a bright and breezy tween fantasy romantic comedy that coasts along on its charming performances and the light comedic touch of first-time feature director Elizabeth Allen. Playing like "Splash" in a training bra, this mermaid-out-of-water story should perform swimmingly with its target audience of young females, who will no doubt be lured by its popular teenage leads Emma Roberts, star of Nickelodeon's "Unfabulous," and pop singer JoJo, aka Joanna Levesque.

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