Even when she's playing a girl with a head full of air in a plot full of holes, Mandy Moore manages to make "Chasing Liberty" wholesomely appealing. It's too bad that "wholesome," in this case, means frolicking around Prague, Venice, and Berlin as the U.S. President's daughter, eluding Secret Service agents, defying her second-term President father (Mark Harmon, totally miscast), and trusting complete strangers in a world where potential terrorism seems like nothing more than a pesky distraction. In other words, first daughter Anna Foster (Moore) is a complete idiot, oblivious to danger in a fluffy romantic fantasy that's part "Roman Holiday" (the good part) and part bubble-gum star vehicle. Don't blame Mandy for daring to shed her good-girl image; even her innocent skinnydipping scene was handled by a "butt double," and she's irresistible as she falls for the mutually smitten Secret Service agent (promising newcomer Matthew Goode) assigned to keep her out of harm's way. Another budding romance involving two bickering agents (Annabella Sciorra, Jeremy Piven) is perfunctory at best, but if you're looking for a picturesque, sweet-natured tour of Europe with a pair of likeable lovebirds, "Chasing Liberty" makes for a pleasantly brief vacation. "--Jeff Shannon"