Since every _player's_ (and therefore character's) concept of beauty is different, I'd say you may be better off mentioning the physical charactertistics (like hair and lips) but emphasizing the comparison aspect of 'all other woman are shadows in comparison' and the 'your heart skips a beat ...' and 'with a body that seems sculpted by the hands of the gods themselves, with perfect curves and alluring aura' type stuff (as was suggested earlier)