If you have kids of a certain age, the thought of ice princesses, talking snowmen and letting it go may be enough to bring you out in very cold sweats. But if you look past the relentless, heavily merchandised juggernaut surrounding the original Frozen, it’s actually one of Disney’s best fairytale retellings (it's based on Hans Christian Andersen's The Snow Queen), with a pair of inspiring female leads, spectacular animation and, yes, some killer songs.